Page 72 - TB_6B

3 . Evaluate each expression with three rational numbers.

1 3 7 = 1 37 Use the rules for addition of rational
5 4 10 5 4 10 numbers.
Add the numbers with the same sign first.
= 1 7 3 Find the common denominator of
5 10 4 5 and 10.
Find the common denominator of
= 9 3 10 and 4.
10 4

= 3
20

a. 1 1 5 = 1 5 1 b. 1.5 2.4 3.8 = 1.5 3.8 2.4
4 2 8 4 8 2 = 5.3 2.4
= 2.9
= 7 4
8 8 d. 7.1 1.29 3.1

= 3
8

c. 4 1 1
5 3 2

e. 2 1 1 1 3 f. 8.3 3.7 1
2 3 4

22. Rational Numbers 61