Grade 4 - Progress in Mathematics

Use Parentheses

14-6

How would you go about using the

order of operations to simplify

this problem?

40 
 3  5 (10 2) a

To simplify:


Always do the operations 40 
 3  5 (10 2) a

in parentheses first.

Next, multiply or divide. 40 
 3  5  5 a

Work in order from left to right.

Then, add or subtract. 40 
 15  5 a

Work in order from left to right.

25  5  30

Study these examples.

2 (4 3) 
 10 (4 4) b (4 2) (9 3) 
 10  1 u

2  7 
 10  16 b 8  3 
 10  1 u

14 
 10  16 b 11 
 10  1 u

4  16  20 1  1  2

Simplify.

1. (6
   2) (6 2) 2. (8 4) (9
   5)


2. (56 8) (10 7) 4. (4 12)
   (20
   15)


3. 9.7 (6.1
   5.1) 6. 20
   (10
   5.5)


4. (8.1
   8.1) (5 4) 8. (3.2 4.6)
   (2 2)

1.3

8204-6_452-453 10/8/07 6:44 PM Page 452