Grade 1Addition & Subtraction

1.OA.B.3

Use the fact that order does not matter, and that you can regroup addends, to make adding easier.

Worksheets for this standard 1 topic

Add in Any Order5 ways

The standard, officially

Apply properties of operations as strategies to add and subtract.* Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.) *Students need not use formal terms for these properties.

Builds on

K.OA.A.2Solve add and subtract stories to 10

Leads to

1.OA.C.6Add and subtract within 20 2.NBT.B.9Explain why a strategy works 4.NF.B.3Add and subtract fractions 6.EE.A.3Rewrite expressions in equal forms 6.EE.A.4Identify equivalent expressions