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Math Grade K-1 Answer Key

True or False: Is the Number Sentence Correct?

Checking simple addition and subtraction sentences

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True or False: Is the Number Sentence Correct?

Checking simple addition and subtraction sentences

Math - Grade K-1

Instructions: Read each number sentence. Write True if it is correct. Write False if it is not correct.
  1. 1

    Is this number sentence true or false? 2 + 3 = 5

    Count 2 objects, then count 3 more objects.

    The number sentence is true because 2 plus 3 equals 5.
  2. 2

    Is this number sentence true or false? 4 + 1 = 6

    The number sentence is false because 4 plus 1 equals 5, not 6.
  3. 3

    Is this number sentence true or false? 5 - 2 = 3

    Start with 5 fingers and put 2 fingers down.

    The number sentence is true because when 2 are taken away from 5, 3 are left.
  4. 4

    Is this number sentence true or false? 6 - 3 = 4

    The number sentence is false because 6 minus 3 equals 3, not 4.
  5. 5

    Is this number sentence true or false? 1 + 1 = 2

    Count one cube and one more cube.

    The number sentence is true because 1 plus 1 equals 2.
  6. 6

    Is this number sentence true or false? 3 + 2 = 4

    The number sentence is false because 3 plus 2 equals 5, not 4.
  7. 7

    Is this number sentence true or false? 7 - 1 = 6

    Count back one number from 7.

    The number sentence is true because taking 1 away from 7 leaves 6.
  8. 8

    Is this number sentence true or false? 0 + 5 = 5

    Think about having 5 toys and getting 0 more toys.

    The number sentence is true because adding 0 does not change the number.
  9. 9

    Is this number sentence true or false? 8 - 4 = 5

    The number sentence is false because 8 minus 4 equals 4, not 5.
  10. 10

    Is this number sentence true or false? 2 + 2 = 4

    Count two objects, then add two more objects.

    The number sentence is true because 2 plus 2 equals 4.
  11. 11

    Is this number sentence true or false? 9 - 0 = 9

    The number sentence is true because taking away 0 leaves the same number.
  12. 12

    Is this number sentence true or false? 5 + 4 = 10

    Use your fingers to count 5 and 4 more.

    The number sentence is false because 5 plus 4 equals 9, not 10.
  13. 13

    Is this number sentence true or false? 10 - 5 = 5

    Start with 10 and count back 5 numbers.

    The number sentence is true because 10 minus 5 equals 5.
  14. 14

    Is this number sentence true or false? 6 + 2 = 8

    The number sentence is true because 6 plus 2 equals 8.
  15. 15

    Is this number sentence true or false? 4 - 4 = 1

    If you take away all 4, none are left.

    The number sentence is false because 4 minus 4 equals 0, not 1.
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