Adding Within 100 and Regrouping

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

• • 4 tens and 12 ones

• 8 tens and 2 ones

• • 7 tens and 8 ones

• • 7 tens and 12 ones

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

• Yes, regroup 10 ones into 1 ten

• No, you don't need to regroup

• Yes, regroup 1 ten into 10 ones

• No, add tens and ones separately

A store had 87 pencils. 25 pencils were sold. How many pencils are left in the store?

• 50

• 40

• 62

• 75

John has 25 stickers. He gives 13 stickers to Sarah. How many stickers does John have left?

• 12: 1 ten and 2 ones

• 38: 20 tens and 18 ones

• 13: 13 ones

A store had 87 pencils. 25 pencils were sold. How many pencils are left in the store?

• 50

• 40

• 62

• 75

Which of the following addition problems requires regrouping?

• a) 33 + 44

• b) 52 + 17

• c) 61 + 19

• d) 28 + 31

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

• • Regroup in the tens place

• • Regroup in the ones place

• No regrouping is needed

• • Regroup in both places

75 + 19 = ______

• 80

• 95

• 93

• 94

49+28

• 77

• 21

• 79

• 81

4 + 3

• 7

• 5

• 6