Value of expressions, properties of operations, Roman numerals
Answers are for parents and teachers.
1
If b = 30 work out: b + 15; b − 10; 90 − b
45, 20, 60
2
The easy way: 16 + 7 + 3; 45 + 12 + 8
26, 65
3
Write all the numbers (from 0) that make x + 5 < 9 true.
0, 1, 2, 3
4
Write in Roman numerals: 3, 8, 12, 20
III, VIII, XII, XX
5
Does a clock at home use Roman numerals? Where else have you seen them?
Answers will vary.