Math Games /
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All Addition math games
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Addition within 10
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Addition word problem within 10
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Addition missing number within 10
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Addition missing number word problem within 10
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Addition missing number with 3 numbers within 10
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Addition of 3 numbers within 20
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Addition of 3 numbers word problem within 20
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Addition metric distance word problem within 20
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Addition of 2-digit numbers within 40
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Addition with 2-digit numbers within 100
- All Addition math games
- Addition within 10
- Addition word problem within 10
- Addition missing number within 10
- Addition missing number word problem within 10
- Addition missing number with 3 numbers within 10
- Addition of 3 numbers within 20
- Addition of 3 numbers word problem within 20
- Addition metric distance word problem within 20
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Addition of 2-digit numbers within 40
- Addition with 2-digit numbers within 100
The sum of 17 and 19 is ?
+10 | +9 | |||
| 17 | 27 | ? |
When adding numbers, it can be helpful to decompose the second number using the place value method and then use the arrow method to grow the first number by each place value
For example, if we have 225 + 653
- Decompose 653 into 6 hundreds, 5 tens, and 3 ones
- Grow 225 by +600 (=825)
- Grow 825 by +50 (=875)
- Grow 875 by +3 (=878)
Strategies: Array Model