Arithmetic Grade One
Lesson Fifty-eight: Missing Numbers
Missing Numbers
Figure out the missing number:
ANSWER: 1
| PROBLEM |
REARRANGE |
ANSWER |
 |
7 - 5 = |
2 |
 |
10 - 6 = |
4 |
 |
8 - 7 = |
1 |
NOTE: Explain that by rearranging the subtraction problem with the missing
number, it is possible to find the missing number (as shown in the last
three examples). Do a few more examples with the student.
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