Solution to

Frame 3-12.

addition of whole numbers. The difference is that there is a decimal point

to keep in mind. The decimals are put in a straight column; that is,

a. 4/1000 = 1/250

DECIMAL POINTS ARE UNDER DECIMAL POINTS (see example). The

decimal point is brought down to the sum, and the addition is carried on

b. 31/10000 (will not

just as it is in whole number addition. Rules for carrying still apply.

reduce)

1

Example:

6.9

0.01

22.2201

29.1301

1

NOTE: Zeros may be added after

6.9000

the last number of a decimal to

0.0100

help keep the digits in the proper

22.2 201

alignment (or columns) as shown

29.1301

Add these decimals: 33.79 + 0.0097 + 2.4 + 6

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Solution to

Frame 3-13.

basically the same as they are in the subtraction of whole numbers.

Just as in the addition of decimals, the decimal points must be lined up

1 1

under each other. If the top number (minuend) has fewer decimal places

33.79

then the number on the bottom (subtrahend), then you must add zeros

0.0097

after the last digit of the top number until both numbers have the same

2.4

number of places to the right of the decimal. Rules for "borrowing" still

6.

apply.

42.1997

Solve these problems:

a. 729.75309 - 0.0077

b. 3 - 0.003

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MD0900

3-7

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