Make 100

10Make 100.png
10Make 100.png

Make 100

0.99

2.NBT.6

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Additional Information

  • Use mental math to write the missing addend that will make 100.

  • Before taking this Sprint, students should be comfortable using one of the following strategies:

  • Make the next ten, then make 100.

    For the problem 38 + ___ = 100:

    38 + 2 = 40

    40 + 60 = 100

    2 + 60 = 62

    38 + 62 = 100.

  • Add tens & then ones.

    For the problem 27 + ___ = 100:

    27 + 70 = 97

    97 + 3 = 100

    70 + 3 = 73

    27 + 73 = 100.

  • Subtract tens & then ones from 100.

    For the problem 19 + ___ = 100:

    100 – 10 = 90

    90 – 9 = 81

    100 – 81 = 19

    19 + 81 = 100

  • Subtract ones & then tens from 100.

    For the problem 74 + ___ = 100:

    100 – 4 = 96

    96 – 70 = 26

    100 – 74 = 26

    74 + 26 = 100