Addition or Subtraction?
Regular Equations
Strategy/Tools
Solving Word Problems
10

Madison had 38 crayons in her box. Her best friend gave her 24 more. How many crayons does she have now?

Addition 


10

54+32

86

10

This tool helps us with the break apart strategy. It has numbers and lines

number line

10
Alexis had 53 cookies. She ate 20 of them. How many cookies does Alexis have lef?
33
20

Ashley has 47 cookies. Her friend has 23 cookies. How many cookies do they have all together?

addition 

20

67+21

88

20

This strategy breaks apart the smaller number only

break apart strategy

20
Sara has 82 magazines. She gave some to her sister. Now she has 45 magazines. How many magazines did she give to her sister?
37
30

Evan has 89 summer reading books. Dina has 75 summer reading books. How many more books does Evan have?

subtraction

30

95-23

72

30

This tool is in the shape of a square and has numbers 1-100 on it

hundreds chart 


30
There are 38 children on a bus. Some more people get on the bus. Now there are 105 people on the bus. How many people got on the bus?
67
40

Mrs. F's class read 62 books. Mr. M's class read 54 books. Mrs. B's class read 50 books. How many books did the second grade read all together?

addition
40

86+75

161

40

This strategy is only used for addition. For this strategy, we break apart both numbers in the equation 

Partial Sums

40

Tim has 75 markers. Dave has 25 more markers than Tim. How many markers does Dave have?

75+25=100

50

Yesterday, the Pizza Palace sold 120 sodas. Today it sold 94 sodas. How many fewer sodas did the Pizza Palace sell today than yesterday?


subtraction 

50

73-48

25

50

This strategy places the numbers on top of each other and lines it up by place value 

stacking method or algorithm 

50

The band sold 130 tickets to adults and 96 tickets to children. How many tickets did the band sell? 

226

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