Addition within 100 with regrouping

Which base 10 block model represents the sum of 47 + 35?

• • a) 4 tens and 12 ones

• b) 8 tens and 2 ones

• • c) 7 tens and 8 ones

• • d) 7 tens and 12 ones

Tags

CCSS.2.NBT.B.7

What is the correct regrouping for the sum of 56 + 38 using base 10 blocks?

• • a) 8 tens and 4 ones

• • b) 9 tens and 6 ones

• • c) 9 tens and 14 ones

• • d) 9 tens and 4 ones

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Look at the base 10 blocks for 63 + 29. Do you need to regroup?

• • a) Yes, regroup 10 ones into 1 ten

• • b) No, you don't need to regroup

• • Yes, regroup 1 ten into 10 ones

• • No, add tens and ones separately

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Which expanded form shows the correct steps for adding 54 + 29?

• • a) (50 + 20) + (4 + 9) = 70 + 13

• • b) (50 + 30) + (4 + 9) = 80 + 13

• • c) (50 + 20) + (4 + 8) = 70 + 12

• • d) (40 + 30) + (9 + 6) = 70 + 15

Tags

CCSS.2.NBT.B.5

Which of these expanded form equations does NOT require regrouping?

• • a) (30 + 20) + (9 + 7) = 50 + 16

• • b) (40 + 30) + (2 + 8) = 70 + 10

• • c) (50 + 10) + (3 + 6) = 60 + 9

• • d) (60 + 10) + (8 + 9) = 70 + 17

Tags

CCSS.2.NBT.B.5

What is the sum of 47 + 36 using the standard algorithm?

• • a) 73

• • b) 83

• • c) 82

• • d) 93

Tags

CCSS.6.NS.B.3

Which of the following addition problems requires regrouping?

• • a) 33 + 44

• • b) 52 + 17

• • c) 61 + 19

• • d) 28 + 31

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

When adding 58 + 24, where do you need to regroup?

• • a) Regroup in the tens place

• • b) Regroup in the ones place

• c) No regrouping is needed

• • d) Regroup in both places

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5