Grade 4 - Progress in Mathematics

8 
 24 50 
 24

More Multiplying by Two-Digit Numbers

4-13

Kara packed 24 pieces of fruit into each

of 58 fruit baskets. How many pieces of

fruit did Kara pack into the baskets?

To find how many, multiply: 58 
 24

First, use rounding 24 20

to estimate: 
 58 
 60

about 1200

Then multiply.

Multiply by Multiply by Add the

the ones. the tens. partial products.

2 2

3 3 3

2 4 2 4 2 4


 5 8 
 5 8 
5 8

1 9 2 1 9 2 1 9 2

1 2 0 0 1 2 0 0

1 3 9 2

Kara packed 1392 pieces of fruit.

Study these examples.

3

1 3

2 2 $ .3 5


 4 6 
 6 7

1 3 2 2 4 5

8 8 0 2 1 0 0

1 0 1 2 $2 3.4 5

Think

1392 is close to

1200. The answer
      is reasonable.

6 
 22

40 
 22

7 
 35

60 
 35

This zero

does not have

to be written.

3.3

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