Solution to

Frame 1-32

two or more different operations. For example: 3 x 5 + 1 requires

multiplication and addition. Is the answer 16 (15 + 1) or 18 (3 x 6)? The

25

CHECK

rule is that, unless the problem indicates otherwise, you should multiply

12

12

and divide first. After these operations are completed, then you add and

50

25/ 300

subtract.

25

25

300

50

50

Practice by solving these problems.

0

OR

a. 21 + 5 x 2 = __________

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12/ 300

b. 20 5 1 = __________

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Solution to

The previous frame tells you to multiply/divide, then add/subtract "unless

Frame 1-33

the problem indicates otherwise." What does this mean?

a. 31

(21 + 10)

Sometimes, you need to add or subtract first, then multiply or divide.

This is usually indicated by inclosing the operation to be done first in

b. 3

(4 1)

parentheses ( ). For example, 3 x 5 + 1 = 16 because you follow the

basic rule of multiply and divide first, but 3 x (5 +1) indicates that you are

to perform the addition function first. In this instance, the answer is 18

(3 x 6 = 18).

Practice by solving these problems.

a. (21 + 5) x 2 = __________

b. 20 (5 1) = __________

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MD0900

1-14

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