Grade 4 - Progress in Mathematics

Products: Front-End Estimation

4-5

Use front-end digits to estimate the product.

1. 82 2. 98 3. 46 4. $ .73 5. $ .57
   
   6
   7
   5
   3
   2


2. 473 7. $ 9.01 8. 5125 9. 1070 10. $ 32.95
   
   8
   4
   9
   6
   7


3. 849 12. $ 6.53 13. 4673 14. 7211 15. $ 32.24
   
   4
   3
   8
   5
   9

Write $and.

in the product.

$ 20.00


 5

$ 100.00

Will 5 games cost more or

less than $100?

To find if the games will cost more

or less than $100, use front-end estimation.

Multiply the front digit Write 0s for the

of each factor. other digits.

$ 2 5.95 $ 2 5.95


 5 
 5

$10 about $ 100. 00

Since $ 25.95 is greater than $ 20, the actual cost

is close to but greater than $ 100.

The 5 games will cost more than $ 100.

Study these examples.

62 $ 5 .28 8406 $. 71


 6 
 7 
 8 
 3

about 360 about $ 35 .00 about 64 ,000 about $2.1 0

$25.95

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