Mental Maths
22 + 57 =
79
Find 50% of 40
What is 20?
Increase 100 by 50%
What is 150?
Decrease 100 by 10%
What is 90?
97x5
What is the best estimate of this multiplication
500
37 + 44 =
81
Find 10% of 65
What is 6.5?
Increase 70 by 50%
What is 105?
Decrease 60 by 50%
What is 30?
32 x 12
What is the best estimate of this multiplication
300
74-25
49
Find 5% of 80
What is 4?
Increase 40 by 25%
What is 50?
Decrease 50 by 10%
what is 45?
48 x 2.8
What is the best estimate of this multiplication
150
152 - 126 =
26
Find 75% of 60
What is 45?
Increase 540 by 10%
What is 594?
Decrease 20 by 20%
What is 16?
83 divided by 4
What is the best estimate of this division
20
86 - 32 =
53
Find 90% of 70
What is 63?
Increase 80 by 5%
What is 84?
Decrease 78 by 10%
What is 70.2?
8.7 divided by 2.8
What is the best estimate of this division
3