SME
Grade 2 Math · Problem type
Add or subtract 10 and 100
Use this for “What is 10 more than 356? What is 100 less than 356?”
Picture
Flats are hundreds, rods are tens, small cubes are ones.
More: 366
Less: 346
Change: 10
This is an example. Type the numbers from your problem to start.
Number
example
Change
example
More
answer
Less
answer
Number sentences
356 + 10 = 366
356 − 10 = 346
Good to know
•
10 more or 10 less changes the tens digit by 1.
•
100 more or 100 less changes the hundreds digit by 1.
•
Past 9 or below 0, the next place changes too.
Step-by-step
WE KNOW
Number: 356
Change: 10
FIND
more, less
Step 1 · Find more
356 + 10 = ?
Change the tens digit by 1: up. The other digits stay the same.
Tens digit: 5 → 6
More: 366
Step 2 · Find less
356 − 10 = ?
Change the tens digit by 1: down. The other digits stay the same.
Tens digit: 5 → 4
Less: 346
Check
Put the numbers back in. Both sides should match.
356 + 10 = 366 ✓
356 − 10 = 346 ✓
Topic check
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