Numbers (ch2)
What is a natural number? (two points)
a + a + a
3a
3 times b
3b
5 more than y
y + 5
Round 13.785 to two decimal places
13.79
2x + 4x
6x
4a - 2a
2a
y + 1
4 times x
4x
Solve (5 + 2)2 - 6
43
4x - 2y + 3x + y
7x - y
5p + 2q - 3p + q
2p + 3q
the sum of a and b
a + b
x times x
x2
simplify: 2/7 + 1/14
5/14
7a + b - 5a - 4b
2a - 3b
3x - 4y - 6x + 5y
-3x + y
3 multiplied by a
3a
a time a times a
a3
12
x2 + 3x + 2x2 - x + 4
3x2 + 2x + 4
x2 + 3x + 2x2 + 3x -2
3x2 + 6x -2
b times b times b
b3
a less than b
b - a