Rational numbers, powers, square roots and repeating decimals
Answers are for parents and teachers.
1
Compute (−1)²⁰¹⁸ + (−1)²⁰¹⁷.
0
2
Find √(25/36).
5/6
3
Write 5/11 as a decimal and state its period.
0.(45); the period is 45
4
Compute (−2/3) · (9/10).
−3/5
5
Write 3/8 as a finite decimal. Why is it finite?
0.375; the denominator 8 = 2³ has only the prime factor 2.