Grade 4 - Progress in Mathematics

Update your skills. See page 6.

Check Addition and Subtraction

2-9

To check addition with more

than two addends, add up.

 1899


 1427


 352


 120


 1899 The answer checks.

To check addition with two addends,

subtract one addend from the sum.

The answer is the other addend.

$2.36 $5.38


 3.02  3.02

$5.38 $2.36 The answer checks.

To check subtraction, add the difference

and the subtrahend. The answer is

the minuend.

$8.37 $6.25

2.12 
 2.12

$6.25 $8.37 The answer checks.

Addition and subtraction

are inverse operations.

Add or subtract. Then check the answer.

1. 153
   516 2. $4.95$1.74 3. 762  250


2. 2301
   5090 5. 7799  626 6. $24.41
   $11.44

3.0

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