Review. Divisors and multiples
Answers are for parents and teachers.
1
Write all divisors of 36 and say how many there are.
1, 2, 3, 4, 6, 9, 12, 18, 36: nine divisors.
2
Compute 8 · 63 + 8 · 37 conveniently.
800
3
A notebook costs 2,400 soms. How many soms do 5 notebooks cost?
12000
4
Find 15% of 80.
12
5
Find the divisors of 13. Why are there so few?
Only 1 and 13. No other number divides 13 exactly.