Post-Assessment 2B Session 5

Jenna has 13 paper clips. Marco has 5 paper clips. Which number sentence tells how many more paper clips Jenna has?

• 10 - 5 = 5

• 13 + 5 = 18

• 13 - 4 = 9

• 13 - 5 = 8

Add.

Estimate the difference.

88 - 21 =

Subtract.

Add.

38 + 20 =

Subtract.

74 - 60 =

In which problem do you need to regroup?

• Start with 7 tens 2 ones. Add 4 ones.

• Start with 5 tens 3 ones. Add 8 ones.

• Start with 3 tens 1 one. Add 8 ones.

• Start with 1 ten 6 ones. Add 2 ones.

Add.

In which problem do you need to regroup?

• Start with 4 tens 5 ones. Subtract 4 ones.

• Start with 8 tens 7 ones. Subtract 7 ones.

• Start with 3 tens 1 one. Subtract 2 ones.

• Start with 5 tens 5 ones. Subtract 5 ones.

Subtract.