More addition & subtraction

Addition with regrouping

Name: ______________________________Date: ______________Score: ______ / 20

1.
Which addition means you must regroup ten ones as one ten?
1. A67 + 29
2. B43 + 56
3. C42 + 55
2.
Work out 43 + 56.
3.
Work out 67 + 29.
4.
Work out 84 + 62.
5.
Work out 71 + 87.
6.
Work out 64 + 72.
7.
Work out 75 + 34.
8.
Which addition means you must regroup ten tens as one hundred?
1. A43 + 56
2. B34 + 21
3. C84 + 62
9.
Work out 233 + 50.
10.
Work out 178 + 60.
11.
Work out 154 + 65.
12.
Work out 191 + 56.
13.
Work out 286 + 352.
14.
Work out 473 + 166.
15.
Work out 645 + 272.
16.
A library has 519 fiction and 348 non-fiction books. How many books are there all together?
books
17.
Round each number to the nearest 10 to estimate 645 + 272.
1. A920
2. B900
3. C950
18.
Estimate 84 + 62 by rounding each number to the nearest 10.
19.
Addition is commutative. Which has the same total as 26 + 71?
1. A71 − 26
2. B71 + 26
3. C26 − 71
20.
Because addition is commutative, 45 + 30 gives the same total as 30 + 45.
True False

Answer key

More addition & subtraction — Addition with regrouping