Rational numbers
Answers are for parents and teachers.
1
Write 5/8 as a decimal and a percent.
5 ÷ 8 = 0.625 = 62.5%.
2
Find 7/12 − 1/4.
7/12 − 3/12 = 4/12 = 1/3.
3
Calculate cleverly: −3.4 + 1.9 + 3.4.
(−3.4 + 3.4) + 1.9 = 1.9.
4
Find (−4/9) × (3/8).
Cancel 4 with 8 and 3 with 9: −(1/3) × (1/2) = −1/6.
5
Find 5/6 ÷ (−5/9).
5/6 × (−9/5) = −9/6 = −3/2 (that is −1.5).