More addition & subtraction

Subtraction with regrouping

Name: ______________________________Date: ______________Score: ______ / 20

1.
In which subtraction do you not have enough tens, so you regroup a hundred as 10 tens?
1. A246 − 84
2. B246 − 24
3. C268 − 45
2.
Work out 245 − 82.
3.
Work out 534 − 93.
4.
Work out 647 − 386.
5.
A factory makes 375 T-shirts. A van collects 168 of them. How many T-shirts are left?
T-shirts
6.
763 = 600 + ? + 3 when you exchange 1 hundred for 10 tens. What is the missing number?
7.
Estimate 534 − 93 by rounding each number to the nearest 10.
8.
A park has 243 adults and children. If 151 are children, how many are adults?
9.
To subtract 246 − 84, you regroup 1 hundred as 10 tens because there are not enough tens.
True False
10.
534 − 93 = 431.
True False
11.
What does 'exchange' mean in subtraction?
1. AAdd two numbers
2. BTrade 1 hundred for 10 tens (or 1 ten for 10 ones)
3. CRound to the nearest 10
12.
Work out 462 − 275.
13.
Before solving 355 − 172, which is a good estimate?
1. A360 − 170 = 190
2. B300 − 100 = 200
3. C400 − 200 = 200
14.
Work out 100 − 27.
15.
Work out 528 − 76.
16.
Work out 384 − 362.
17.
Work out 381 − 375.
18.
Work out 20 − 18.
19.
Work out 182 − 41.
20.
Work out 215 − 59.

Answer key

More addition & subtraction — Subtraction with regrouping