Mental arithmetic
What is 25 + 13?
37
What is 50 - 25?
25
What is 8 x 6?
48
What is 64 ÷ 8?
8
What is 35 + 17?
52
What is 80 - 60?
20
What is 7 x 9?
63
What is 144 ÷ 12?
12
What is 42 + 28?
70
What is 100 - 75?
25
200×120
24000
160÷6
40
Square root of 7 is the same as
7 times 7