Positive or Negative?
Calculate: −14 + 8
−6
Find the HCF of 12 and 20.
4
Find the square root of 64.
8
Write an expression for 9 more than a number x.
x + 9
Simplify: 8x + 5x − 4x
9x
Calculate: 9 − (−7)
16
Find the LCM of 4 and 10.
20
Find ∛125.
5
One notebook costs y dollars. Write an expression for the total cost of 7 notebooks.
7y
Simplify: 6p + 4q − 2p + 3q
4p + 7q
Calculate: −8 × 6
−48
Find the HCF of 36 and 54.
18
Find √361.
19
Write an expression for 5 less than three times a number n.
3n − 5
Expand: 4(x + 7)
4x + 28
Calculate: −72 ÷ (−9)
8
Find the LCM of 15 and 20.
60
Calculate: √169 + ∛512
13 + 8 = 21
Find the value of 6a + 4 when a = 7.
6 × 7 + 4 = 46
Expand and simplify: 3(2y + 4) + 5y
6y + 12 + 5y = 11y + 12
Calculate: −15 + 7 − 12
−20
Two bells ring together at 10:00 a.m. One rings every 9 minutes and the other every 12 minutes. After how many minutes will they next ring together?
36 minutes. They will ring together at 10:36 a.m.
Calculate: √576 + ∛1000
24 + 10 = 34
A rectangle has length 12 cm and width 7 cm. Use P = 2(l + w) to find its perimeter.
2(12 + 7) = 38 cm
Expand and simplify: 4(3m − 2) + 2(5 + m)
12m − 8 + 10 + 2m = 14m + 2