6th Grade Math Textbook, Progress

6

Subtract Whole Numbers and Decimals

Subtract: 4816 
 1932 .

First estimate by rounding: 5000 
 2000 3000. Then subtract.

To subtract whole numbers:

Subtract More tens needed.

More hundreds

Subtract the

the ones. Regroup. Subtract.

needed. Regroup.

Subtract. thousands.

17 17

711 3 711 3 71 1


 4816 
 4816 
 4816 
 4816


 1932 
 1932 
 1932 
 1932


 0004 
 008 4 
0 8 84 
 2884

The difference is 2884.

?

Think

2884 is close to the

estimate of 3000.

Subtract: 0.7
0.46.

First estimate by rounding to the nearest tenth: 0.7
0.50.2. Then subtract.

To subtract decimals:

Line up the Subtract. Regroup Write the

decimal points. if necessary. decimal point.

610 610

0.7 0 0.7 0 0.7 0


0.4 6 
0.4 6 
0.4 6

. 24  0. 24

The difference is 0.24.

?

Think

0.24 is close to the

estimate of 0.2.

Estimate by rounding. Then subtract.

1. 
   489 2.
   6244 3.
   36,243 4.
   456,781 5.
   587,893
   
   366
   0029
   13,963
   179,660
   498,721


2. 
   0.74 7.
   0.81 8.
   $.95 9. $14.97 10. 0.8
   0.29
   
   0.39
   0.6
   .59
   10.49

Operations II

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