Mentally Add/Subtract 10 or 100
Elementary School Math · Flashcards · Recall
ELEMENTARY SCHOOL MATH · FLASHCARDS
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QUESTION
What happens to the tens digit when you add
10
10
10
to a number from
100
100
100
to
900
900
900
?
QUESTION
What happens to the hundreds digit when you subtract
100
100
100
from a number from
100
100
100
to
900
900
900
?
QUESTION
What happens to the hundreds digit when you add
100
100
100
to a number from
100
100
100
to
900
900
900
?
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ANSWER
The hundreds digit increases by
1
1
1
. Adding
100
100
100
changes only the hundreds place value.
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