Operations and Computation: Glossary
114 words, listed in the order you meet them in Courseversity lessons.
All words in this topic
Grade 1
add
From Grade 1
Put groups together to find the total.
Learn it in: Meaning of addition (Grade 1), Area of composite rectangular figures (Grade 4)
altogether
From Grade 1
How many in all.
Learn it in: Meaning of addition (Grade 1), Counting categories (Grade 1), Two-step word problems (Grade 2)
sentence
From Grade 1
A number sentence, like 3 + 2 = 5.
Learn it in: Combining groups (Grade 1), Subtraction using pictures (Grade 1)
total
From Grade 1
The number you get when you add.
Learn it in: Combining groups (Grade 1), Addition using pictures (Grade 1), Simple money problems (Grade 1)
check
From Grade 1
Make sure an answer is right.
Learn it in: Addition using objects (Grade 1), Taking away objects (Grade 1), Relationship between addition and subtraction (Grade 1)
number sentence
From Grade 1
Numbers and signs that tell a maths story, like 4 + 2 = 6.
Learn it in: Addition using objects (Grade 1)
objects
From Grade 1
Real things you can touch, like stones or seeds.
Learn it in: Addition using objects (Grade 1)
picture
From Grade 1
A drawing that shows something.
Learn it in: Addition using pictures (Grade 1), Subtraction using pictures (Grade 1), Multiplication using pictures (Grade 2)
tally mark
From Grade 1
A line we draw for each thing we count.
Learn it in: Addition using pictures (Grade 1), Simple tally marks (Grade 1), Tally charts (Grade 2)
number bond
From Grade 1
Two numbers that make a total together, like 6 and 4 make 10.
Learn it in: Number bonds to 10 (Grade 1), Subtraction within 20 (Grade 1), Mental computation (Grade 4)
part
From Grade 1
One of the numbers in a bond.
Learn it in: Number bonds to 10 (Grade 1), Equal parts (Grade 2), Ratio word problems (Grade 6)
whole
From Grade 1
The total, like 10.
Learn it in: Number bonds to 10 (Grade 1), Equal parts (Grade 2), Halves (Grade 2)
double
From Grade 1
Add the same number twice, like 4 + 4.
Learn it in: Addition within 20 (Grade 1), Mental addition strategies (Grade 2), Multiplication facts for 2, 5 and 10 (Grade 2)
make ten
From Grade 1
Fill up to 10 first, then add the rest.
Learn it in: Addition within 20 (Grade 1)
strategy
From Grade 1
A plan for solving a problem.
Learn it in: Addition within 20 (Grade 1), Subtraction within 20 (Grade 1), Mental addition strategies (Grade 2)
sum
From Grade 1
The total in an addition.
Learn it in: Addition within 20 (Grade 1), Expanded form (Grade 2), Addition within 100 (Grade 2)
number line
From Grade 1
A line with numbers in order.
Learn it in: Counting-on strategies (Grade 1), Addition within 100 (Grade 2), Skip counting (Grade 2)
clue word
From Grade 1
A word that helps, like altogether or in all.
Learn it in: Addition word problems (Grade 1), Subtraction word problems (Grade 1)
sense
From Grade 1
Does the answer fit the story?
Learn it in: Addition word problems (Grade 1), Subtraction word problems (Grade 1)
solve
From Grade 1
Find the answer.
Learn it in: Addition word problems (Grade 1), Subtraction word problems (Grade 1), Simple equations (Grade 5)
word problem
From Grade 1
A maths problem told as a short story.
Learn it in: Addition word problems (Grade 1), Subtraction word problems (Grade 1)
difference
From Grade 1
The answer to a subtraction.
Learn it in: Meaning of subtraction (Grade 1), Subtraction within 20 (Grade 1), Subtraction within 100 (Grade 2)
left
From Grade 1
What remains after taking away.
Learn it in: Meaning of subtraction (Grade 1), Subtraction using pictures (Grade 1), Position and direction (Grade 1)
subtract
From Grade 1
Take away some from a group.
Learn it in: Meaning of subtraction (Grade 1), Subtraction within 100 (Grade 2), Subtraction within 1,000 (Grade 2)
cross out
From Grade 1
Draw a line through to show taken away.
Learn it in: Taking away objects (Grade 1), Subtraction using pictures (Grade 1)
remain
From Grade 1
What is left over.
Learn it in: Taking away objects (Grade 1), Finding how many remain (Grade 1)
fact family
From Grade 1
Addition and subtraction sentences that use the same three numbers.
Learn it in: Relationship between addition and subtraction (Grade 1), Relationship between multiplication and division (Grade 2), Relationship between multiplication and division (Grade 3)
missing number
From Grade 1
A number we need to find.
Learn it in: Relationship between addition and subtraction (Grade 1)
opposite
From Grade 1
Does the reverse.
Learn it in: Relationship between addition and subtraction (Grade 1), Introduction to integers (Grade 6), Positive and negative numbers (Grade 6)
Grade 2
mental
From Grade 2
Done in your head.
Learn it in: Mental addition strategies (Grade 2), Mental computation (Grade 4)
partition
From Grade 2
Break a number into parts.
Learn it in: Mental addition strategies (Grade 2), Addition within 100 (Grade 2), Partitioning shapes (Grade 2)
carry
From Grade 2
The new ten or hundred moved to the next column.
Learn it in: Regrouping in addition (Grade 2), Addition with regrouping (Grade 3)
estimate
From Grade 2
A close guess.
Learn it in: Regrouping in addition (Grade 2), Checking answers (Grade 2), Estimating measurements (Grade 2)
regroup
From Grade 2
Exchange 10 of one place for 1 of the next.
Learn it in: Regrouping in addition (Grade 2), Regrouping in subtraction (Grade 2), Addition with regrouping (Grade 3)
inverse
From Grade 2
The opposite operation.
Learn it in: Subtraction within 100 (Grade 2), Checking answers (Grade 2), Relationship between multiplication and division (Grade 2)
operation
From Grade 2
Adding or subtracting.
Learn it in: Two-step word problems (Grade 2), Multistep problems (Grade 4), Numerical expressions (Grade 5)
step
From Grade 2
One part of a problem.
Learn it in: Two-step word problems (Grade 2), Multistep word problems (Grade 3)
each
From Grade 2
Every one of the groups.
Learn it in: Equal groups (Grade 2), Simple multiplication problems (Grade 2), Word problems (Grade 3)
multiply
From Grade 2
Find the total of equal groups.
Full explanation with examples and practice →
Learn it in: Repeated addition (Grade 2), Relationship between multiplication and division (Grade 2), Multiplication as equal groups (Grade 3)
product
From Grade 2
The answer to a multiplication.
Full explanation with examples and practice →
Learn it in: Repeated addition (Grade 2), Arrays (Grade 2), Multiplication using pictures (Grade 2)
repeated addition
From Grade 2
Adding the same number again and again.
Learn it in: Repeated addition (Grade 2), Multiplication as equal groups (Grade 3), Area of rectangles using arrays (Grade 3)
array
From Grade 2
Objects in rows and columns.
Learn it in: Arrays (Grade 2), Multiplication arrays (Grade 3), Division using arrays (Grade 3)
multiple
From Grade 2
A number you get by skip counting.
Learn it in: Skip counting (Grade 2), Multiplication tables (Grade 3), Understanding multiples (Grade 4)
bar model
From Grade 2
A bar divided into equal boxes.
Learn it in: Multiplication using pictures (Grade 2), Division using pictures (Grade 2), Fraction word problems (Grade 4)
equal groups
From Grade 2
Groups with the same number in each.
Learn it in: Multiplication using pictures (Grade 2), Multiplication word problems (Grade 4)
fact
From Grade 2
A number sentence you know.
Learn it in: Multiplication facts for 2, 5 and 10 (Grade 2), Multiplication tables (Grade 3)
times table
From Grade 2
A list of multiplication facts.
Full explanation with examples and practice →
Learn it in: Multiplication facts for 2, 5 and 10 (Grade 2), Multiplication tables (Grade 3), Division facts (Grade 3)
groups of
From Grade 2
Same amount in each.
Learn it in: Simple multiplication problems (Grade 2), Making equal groups (Grade 2), Word problems (Grade 3)
in all
From Grade 2
The total.
Learn it in: Simple multiplication problems (Grade 2), Word problems (Grade 3)
story problem
From Grade 2
A problem told as a story.
Learn it in: Simple multiplication problems (Grade 2)
fair
From Grade 2
Equal for everyone.
Learn it in: Sharing equally (Grade 2), Drawing conclusions (Grade 3)
divide
From Grade 2
Share or group equally.
Learn it in: Division using objects (Grade 2), Division using pictures (Grade 2), Relationship between multiplication and division (Grade 2)
division sign (÷)
From Grade 2
The sign that means divide.
Learn it in: Division using objects (Grade 2)
quotient
From Grade 2
The answer to a division.
Learn it in: Division using objects (Grade 2), Division as sharing (Grade 3), Division as grouping (Grade 3)
Grade 3
addend
From Grade 3
A number being added.
Learn it in: Reviewing multidigit addition (Grade 3), Large-number addition (Grade 4), Adding decimals (Grade 5)
minuend
From Grade 3
The number we start with.
Learn it in: Multidigit subtraction (Grade 3), Large-number subtraction (Grade 4), Subtracting decimals (Grade 5)
subtrahend
From Grade 3
The number we take away.
Learn it in: Multidigit subtraction (Grade 3), Large-number subtraction (Grade 4), Subtracting decimals (Grade 5)
borrow
From Grade 3
Take one from the next place.
Learn it in: Subtraction with regrouping (Grade 3), Large-number subtraction (Grade 4)
approximately
From Grade 3
About.
Learn it in: Estimating answers (Grade 3), Estimation (Grade 3), Estimation (Grade 4)
error
From Grade 3
A mistake.
Learn it in: Checking calculations (Grade 3), Checking reasonableness (Grade 6)
plan
From Grade 3
Decide what to do first.
Learn it in: Multistep word problems (Grade 3), Multistep problems (Grade 5), Understanding mathematical problems (Grade 6)
factor
From Grade 3
A number that is multiplied.
Learn it in: Multiplication as equal groups (Grade 3), Multiplication fact review (Grade 4), Understanding factors (Grade 4)
commutative
From Grade 3
The order of the factors does not change the product.
Learn it in: Multiplication properties (Grade 3), Multiplication properties (Grade 4)
distributive
From Grade 3
Split a factor into easier parts.
Learn it in: Multiplication properties (Grade 3), Multiplication properties (Grade 4)
identity
From Grade 3
Multiplying by 1 leaves the number unchanged.
Learn it in: Multiplication properties (Grade 3), Multiplication properties (Grade 4)
basic fact
From Grade 3
A fact like 3 × 4.
Learn it in: Multiplying by multiples of ten (Grade 3), Multiplying by multiples of ten (Grade 4), Division using place value (Grade 4)
multiple of ten
From Grade 3
10, 20, 30 ...
Learn it in: Multiplying by multiples of ten (Grade 3), Multiplying by multiples of ten (Grade 4), Division using place value (Grade 4)
divisor
From Grade 3
The number we divide by.
Learn it in: Division as sharing (Grade 3), Division facts (Grade 3), Division with remainders (Grade 3)
grouping
From Grade 3
Finding how many groups.
Learn it in: Division as grouping (Grade 3), Division word problems (Grade 4)
missing factor
From Grade 3
A number to find in a multiplication.
Learn it in: Relationship between multiplication and division (Grade 3), Factor pairs (Grade 4)
dividend
From Grade 3
The number being divided.
Learn it in: Division with remainders (Grade 3), Division fact review (Grade 4), Division with remainders (Grade 4)
remainder
From Grade 3
What is left over after dividing.
Learn it in: Division with remainders (Grade 3), Division word problems (Grade 3), Division with remainders (Grade 4)
Grade 4
compensate
From Grade 4
Adjust to make a friendly number, then fix.
Learn it in: Mental computation (Grade 4)
multistep
From Grade 4
More than one step.
Learn it in: Multistep problems (Grade 4), Multistep problems (Grade 5), Measurement problem-solving (Grade 5)
associative
From Grade 4
Grouping does not change the product.
Learn it in: Multiplication properties (Grade 4)
partial product
From Grade 4
A part of the product.
Learn it in: Two-digit multiplication (Grade 4), Multidigit multiplication (Grade 4), Multidigit multiplication (Grade 5)
standard algorithm
From Grade 4
The usual written method.
Learn it in: Multidigit multiplication (Grade 4)
compatible numbers
From Grade 4
Numbers easy to compute.
Learn it in: Estimating products (Grade 4), Estimation (Grade 5)
two-step
From Grade 4
Needs two operations.
Learn it in: Multiplication word problems (Grade 4), Simple equations (Grade 5)
repeated subtraction
From Grade 4
Subtract the divisor again and again.
Learn it in: Division strategies (Grade 4)
Grade 5
halving and doubling
From Grade 5
Halve one factor, double the other.
Learn it in: Mental strategies (Grade 5)
order of operations
From Grade 5
Rules for the sequence of steps.
Learn it in: Order of operations (Grade 5), Order of operations (Grade 5), Evaluating expressions (Grade 6)