Grade 4 - Progress in Mathematics

Multiply by One-Digit Numbers

4-4

Multiply.

1. 12 2. 22 3. 13 4. 11 5. 14 6. 12
   
   2
   3
   3
   5
   2
   4

Think

24 2 tens 4 ones

Each of 2 fish tanks holds 24 fish.

How many fish are there?

To find how many, join 2 sets of 24.

2 tens 4 ones

2 tens 4 ones

4 tens 8 ones  40  8  48

Yo u can join 2 sets of 24 by using the distributive property.

2 sets of 24  2 
 24

 2 
(20 4)

(2 
20) (2 
4)

 40  8

 48

Yo u can multiply: 2 
 24

Multiply the ones. Multiply the tens.

24 24


 2 
 2

8 48

2 
 4 ones  8 ones 2 
 2 tens  4 tens

There are 48 fish.

3.2

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