# Add and Subtract to Find the Missing Number (1)

In this worksheet, students find the missing number in the sum using addition and then subtraction.

Key stage:  KS 2

Curriculum topic:   Number: Addition and Subtraction

Curriculum subtopic:   Solve Add/Subtract Problems to 1000

Difficulty level:

### QUESTION 1 of 10

In this worksheet you have to find the missing number in the sum.

Example

Find the missing number in the sum.

134 + ___ + 22 = 160

Step 1:   Add together 134 + 22 = 156.

Step 2:   Work out what you need to reach 160 by calculating 160 - 156 = 4

So,

134 +  4  + 22 = 160

Find the missing number in the sum.

170 + __ + 234 = 406

Find the missing number in the sum.

130 + __ + 233 = 368

Find the missing number in the sum.

97 + __ + 164 = 264

Find the missing number in the sum.

359 + __ + 89 = 449

Find the missing number in the sum.

25 + __ + 254 = 283

Find the missing number in the sum.

51 + __ + 285 = 386

Find the missing number in the sum.

58 + __ + 316 = 424

Find the missing number in the sum.

228 + __ + 100 = 428

Find the missing number in the sum.

155 + __ + 161 = 388

Find the missing number in the sum.

230 + __ + 156 = 428

• Question 1

Find the missing number in the sum.

170 + __ + 234 = 406

2
EDDIE SAYS
Work out 170 + 234 = 404
Then 406 - 404 = 2
• Question 2

Find the missing number in the sum.

130 + __ + 233 = 368

5
EDDIE SAYS
Work out 130 + 233 = 363
Then 368 - 363 = 5
• Question 3

Find the missing number in the sum.

97 + __ + 164 = 264

3
EDDIE SAYS
Work out 97 + 164 = 261
Then 264 - 261 = 3
• Question 4

Find the missing number in the sum.

359 + __ + 89 = 449

1
EDDIE SAYS
Work out 359 + 89 = 448
Then 449 - 448 = 1
• Question 5

Find the missing number in the sum.

25 + __ + 254 = 283

4
EDDIE SAYS
Work out 25 + 254 = 279
Then 283 - 279 = 4
• Question 6

Find the missing number in the sum.

51 + __ + 285 = 386

50
EDDIE SAYS
Work out 51 + 285 = 236
Then 386 - 236 = 50
• Question 7

Find the missing number in the sum.

58 + __ + 316 = 424

50
EDDIE SAYS
Work out 58 + 316 = 374
Then 424 - 374 = 50
• Question 8

Find the missing number in the sum.

228 + __ + 100 = 428

100
EDDIE SAYS
Work out 228 + 100 = 328
Then 428 - 328 = 100
• Question 9

Find the missing number in the sum.

155 + __ + 161 = 388

72
EDDIE SAYS
Work out 155 + 161 = 316
Then 388 - 316 = 72
• Question 10

Find the missing number in the sum.

230 + __ + 156 = 428

42
EDDIE SAYS
Work out 230 + 156 = 386
Then 428 - 386 = 42
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