Mental Calculations Practice 1

24, 25, ___, 27, 28, 29

• 26

• 24

• 27

• 20

12, 11, ___, 9, 8, 7

• 12

• 10

• 13

• 11

1 more than 17

is ___.

• 16

• 18

• 27

• 19

12 + 8 = ___

• 10

• 19

• 20

• 21

1 less than 23

is ___.

• 24

• 23

• 13

• 22

80 – 51 = ___

• 31

• 29

• 65

• 39

11 + 61 = ___

• 72

• 52

• 82

• 50

58 – 4 = ___

• 54

• 62

• 52

• 18

56 + 17 = ___

• 63

• 73

• 72

• 62

89 – 34 = ___

• 55

• 45

• 53

• 46