Worksheet: Addition and Subtraction Strategies (Within 100)

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Think of subtraction as finding the difference between 2 numbers. As long as they both increase by the same amount, the difference will always remain the same.

For example, if you work for 32 hours and your friend works 28 hours, the difference is 4 hours. If you then both work an another 12 hours, the difference is still 4 hours.

Use this idea to make the subtractions below easier. Add to the bottom number to make a multiple of 10 and then add that same number to the top number before doing the subtraction. The first one is done for you.

83 +2 arrow pointing right 85 
– 38 +2 arrow pointing right  40 
    45 
93 +2 arrow pointing right 95 
– 58 +2 arrow pointing right  60 
    35 
85 +3 arrow pointing right 88 
– 47 +3 arrow pointing right  50 
    38 
72 +4 arrow pointing right 76 
– 46 +4 arrow pointing right  50 
    26 
64 +2 arrow pointing right 66 
– 58 +2 arrow pointing right  60 
    6 
56 +3 arrow pointing right 59 
– 37 +3 arrow pointing right  40 
    19 

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42 +5 arrow pointing right 47 
– 25 +5 =  30 
    17 
97 +2 arrow pointing right 99 
– 68 +2 =  70 
    29 
83 +3 arrow pointing right 86 
– 47 +3 arrow pointing right  50 
    36 
75 +4 arrow pointing right 79 
– 56 +4 arrow pointing right  60 
    19 
67 +2 arrow pointing right 69 
– 38 +2 arrow pointing right  40 
    29 
57 +1 arrow pointing right 58 
– 29 +1 arrow pointing right  30 
    28 
44 +2 arrow pointing right 46 
– 28 +2 arrow pointing right  30 
    16 
91 +5 arrow pointing right 96 
– 75 +5 arrow pointing right  80 
    16 

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84 +3 arrow pointing right 87 
– 67 +3 =  70 
    17 
72 +4 arrow pointing right 76 
– 36 +4 =  40 
    36 
62 +2 arrow pointing right 64 
– 28 +2 arrow pointing right  30 
    34 
56 +3 arrow pointing right 59 
– 37 +3 arrow pointing right  40 
    19 
92 +1 arrow pointing right 93 
– 19 +1 arrow pointing right  20 
    73 
62 +5 arrow pointing right 67 
– 25 +5 arrow pointing right  30 
    37 
41 +3 arrow pointing right 44 
– 17 +3 arrow pointing right  20 
    24 
83 +1 arrow pointing right 84 
– 49 +1 arrow pointing right  50 
    34 

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Related Resources

The various resources listed below are aligned to the same standard, (2NBT05) taken from the CCSM (Common Core Standards For Mathematics) as the Addition and subtraction Worksheet shown above.

Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

Flashcard

Game

Matching Game

Lesson

Quiz

Worksheet

Bridging

Number bonds

Slightly Different

    To 100

    Similar to the above listing, the resources below are aligned to related standards in the Common Core For Mathematics that together support the following learning outcome:

    Use place value understanding and properties of operations to add and subtract