 # Add or Subtract 100, 10 or 1 To or From a Number (1)

In this worksheet, students add or subtract 100, 10 or 1 to or from a given number. Key stage:  KS 2

Curriculum topic:   Number: Number and Place Value

Curriculum subtopic:   Find 10 or 100 More or Less than a Given Number

Difficulty level:   ### QUESTION 1 of 10

In this worksheet you have to add or subtract 100, 10 or 1 to or from a number.

When we add or subtract 100, it is the hundreds digit that we change.

When we add or subtract 10, it is the tens digit that we change.

When we add or subtract 1, it is the units digit that we change.

Remember that other digits may have to change too.

Example 1

What number is 100 less than 750?

Reduce 7 hundred by 1 hundred to get 6 hundred...

750 becomes 650

Example 2

What number is 10 more than 539?

Increase 3 tens by 1 ten to get 4 tens...

539 becomes 549

Example 3

What number is 1 less than 539?

Reduce 9 units by 1 unit to get 8 units...

539 becomes 538

Example 4

What number is 10 less than 405?

Here we have to be careful, because we can't reduce the tens digit by 1.

So include the hundreds digit.

Think of it as reducing 40 tens by 1 ten to get 39 tens.

405 becomes 395

What number is 100 less than 532?

What number is 100 less than 509?

What number is 10 less than 726?

What number is 1 less than 241?

What number is 100 more than 864?

What number is 10 more than 671?

What number is 10 more than 814?

What number is 100 more than 776?

What number is 100 less than 418?

What number is 10 less than 702?

• Question 1

What number is 100 less than 532?

432
EDDIE SAYS
Reduce 5 hundred by 1 hundred to get 4 hundred...
532 becomes 432
• Question 2

What number is 100 less than 509?

409
EDDIE SAYS
Reduce 5 hundred by 1 hundred to get 4 hundred...
509 becomes 409
• Question 3

What number is 10 less than 726?

716
EDDIE SAYS
Reduce 2 tens by 1 ten to get 1 ten...
726 becomes 716
• Question 4

What number is 1 less than 241?

240
EDDIE SAYS
Reduce 1 unit by 1 unit to get 0 units...
241 becomes 240
• Question 5

What number is 100 more than 864?

964
EDDIE SAYS
Increase 8 hundred by 1 hundred to get 9 hundred...
864 becomes 964
• Question 6

What number is 10 more than 671?

681
EDDIE SAYS
Increase 7 tens by 1 ten to get 8 tens...
671 becomes 681
• Question 7

What number is 10 more than 814?

824
EDDIE SAYS
Increase 1 ten by 1 ten to get 2 tens...
814 becomes 824
• Question 8

What number is 100 more than 776?

876
EDDIE SAYS
Increase 7 hundred by 1 hundred to get 8 hundred...
776 becomes 876
• Question 9

What number is 100 less than 418?

318
EDDIE SAYS
Reduce 4 hundred by 1 hundred to get 3 hundred...
418 becomes 318
• Question 10

What number is 10 less than 702?

692
EDDIE SAYS
Reduce 70 by 1 to get 69...
702 becomes 692
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