And Subtract Within 100

What is the rule for this pattern?

34, 33, 32, 31, 30, 29, 28, 27

• 1 more

• 1 less

• 10 more

• 10 less

What is 50 less than 82?

• 22

• 92

• 32

• 62

What is 54-20?

• 34

• 74

• 30

• 64

What is 78-40?

• 88

• 38

• 48

• 47

79-52=

• 27

• 131

• 37

• 45

Hunter had 15 marbles. He gave 6 away to his friends. He found 3 more. How many marbles does Hunter have now?

• 12

• 24

• 18

• 15

98-27=

• 71

• 81

• 95

• 65

98-43=

• 65

• 72

• 55

• 45

54-22

• 32

• 31

• 30

• 33

98-27

• 72

• 71

• 70

• 74