Equalities and letter expressions
Answers are for parents and teachers.
1
Write 2 equalities and 2 inequalities.
For example: 6 + 4 = 10, 20 − 5 = 15, 8 > 3, 12 < 21.
2
If a = 5 work out: a + 13; 20 − a; a + a
18, 15, 10
3
Write a letter expression: A class has x girls and 12 boys. How many pupils?
x + 12
4
Compare: 34 + 5 ... 40; 70 − 20 ... 50; 18 ... 9 + 8
<, =, >
5
Use letters for how many apples each person eats a day: dad — a, mum — b, you — c. Total?
a + b + c