Addition
Subtraction
Word Problems
End at a Decade #
+/- Decade #
100

23+14

37

100

34-12

22

100

Mia has 12 apples. She buys 15 more. How many apples does she have?

27

100

What is the next decade number after 31?

40

100

40+10

50

200

46+28

74

200

61-27

34

200

John had 45 marbles. He gave 17 to his friend.  How many does he have now?

28

200

What is the last decade number before 78?

70

200

80-20

60

300

59+36

95

300

85-49

36

300

A baker made 36 cookies in the morning and 48 in the afternoon. How many cookies did he make in all?

84

300

What do I subtract from 63 to get back to the closes decade number?

To get back to 60, you subtract 3.


63-3=60

300

90+20

110

400
67+49

116

400

93-58

35

400

A class has 72 pencils. 29 were used. How many are left?

43

400

What do I add to 76 to get to the next decade number?

To get to 80, you need to add 4.


76+4=80

400

120-40

80

500

88+76

164

500

100-67

33

500

Sam read 37 pages on Monday, 45 pages on Tuesday, and 58 pages on Wednesday. How many pages did he read in total?

140

500

If you are at 47 and jump forward to the next decade number, then back to the last decade number, what number do you land on?

Jump forward to 50, then jump back to 40.

Answer: 40,

500

135+60

195