Courseversity
Grade 2 · Addition and Subtraction
Every published lesson is listed here.
CV-PRI-G02-MATH-OPS-U01-L01
Mental addition strategies
Add quickly in your head using make-ten, doubles and counting on.
CV-PRI-G02-MATH-OPS-U01-L02Addition within 100
Add two-digit numbers within 100 by partitioning and bridging tens.
CV-PRI-G02-MATH-OPS-U01-L03Addition within 1,000
Add three-digit numbers without regrouping.
CV-PRI-G02-MATH-OPS-U01-L04Regrouping in addition
Add with regrouping: carry ten ones to make a ten and ten tens to make a hundred.
CV-PRI-G02-MATH-OPS-U01-L05Subtraction within 100
Subtract within 100 using counting back, partitioning and number lines.
CV-PRI-G02-MATH-OPS-U01-L06Subtraction within 1,000
Subtract three-digit numbers without regrouping.
CV-PRI-G02-MATH-OPS-U01-L07Regrouping in subtraction
Subtract with regrouping by exchanging a ten for ten ones and a hundred for ten tens.
CV-PRI-G02-MATH-OPS-U01-L08Checking answers
Check answers using the opposite operation, estimation and swapping the order.
CV-PRI-G02-MATH-OPS-U01-L09Two-step word problems
Solve word problems that need two steps.