Grade 4 - Progress in Mathematics

7

Whole Number Operations IV

Meaning of Multiplication

To find how many, you can add

3 groups of 7: 7 
 7 
 7  21

3 groups of 7

3 sevens

3  7

Write an addition sentence and

a multiplication sentence for each.

42 ¢ 8¢

factors product

4 groups of 2¢

4 twos

4 2¢

Since you are joining equal groups,

you can multiply:

number



number in



total

of groups each group number

3  7  21

or

Add: 2¢ 
2¢ 
2¢ 
2¢ 8¢

Or multiply: 4 2¢ 

2¢

4or

8¢

?

factor

factor

product

7

 3

21

Remember: 3  7 21 is

a multiplication sentence.

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