Addition Fundamentals
![](https://mathta.wpenginepowered.com/wp-content/uploads/2018/08/hundreds-place1.png)
![](https://mathta.wpenginepowered.com/wp-content/uploads/2022/12/add-tens-by-one-digit-b.png)
1) Add Tens by One-Digit
1) Add Tens by One-Digit
START![](https://mathta.wpenginepowered.com/wp-content/uploads/2018/03/Addingby10.png)
2) Add Two-Digit number by 10
2) Add Two-Digit number by 10
START![](https://mathta.wpenginepowered.com/wp-content/uploads/2022/12/add-one-digit-d.png)
3) Basic Addition
3) Basic Addition
START![adding by missing number 1 adding by missing number 1](https://mathta.wpenginepowered.com/wp-content/uploads/2022/12/adding-by-missing-number-1.png)
4) Determine Unknown Number in Addition Equation
4) Determine Unknown Number in Addition Equation
START![](https://mathta.wpenginepowered.com/wp-content/uploads/2022/12/adding-two-digits-by-tens-a.png)
5) Add Two-Digit number
by multiple of ten
5) Add Two-Digit number
by multiple of ten
![](https://mathta.wpenginepowered.com/wp-content/uploads/2022/12/adding-two-digits-by-one-digit-b.png)
6) Add Two-Digit number by One-Digit
6) Add Two-Digit number by One-Digit
START![adding two-digits by two-digits b adding two-digits by two-digits b](https://mathta.wpenginepowered.com/wp-content/uploads/2022/12/adding-two-digits-by-two-digits-b.png)
7) Add Two-Digit number
by Two-Digits
7) Add Two-Digit number
by Two-Digits
![Adding hundreds by one digit b Adding hundreds by one digit b](https://mathta.wpenginepowered.com/wp-content/uploads/2022/12/Adding-hundreds-by-one-digit-b.png)
8) Add Hundreds by One-Digit
8) Add Hundreds by One-Digit
START![Adding by hundreds b Adding by hundreds b](https://mathta.wpenginepowered.com/wp-content/uploads/2022/12/Adding-by-hundreds-b.png)
9) Add Three-Digit number by 100
9) Add Three-Digit number by 100
START![](https://mathta.wpenginepowered.com/wp-content/uploads/2022/12/Adding-by-hundreds-e.png)
10) Add Three-Digit number by 10
10) Add Three-Digit number by 10
START![](https://mathta.wpenginepowered.com/wp-content/uploads/2022/12/adding-three-digits-by-tens-a.png)
11) Add Three-Digit number by multiple of ten
11) Add Three-Digit number by multiple of ten
START![adding hundreds by hundreds a adding hundreds by hundreds a](https://mathta.wpenginepowered.com/wp-content/uploads/2022/12/adding-hundreds-by-hundreds-a.png)
13) Add Three-Digit number by multiple of one hundred
13) Add Three-Digit number
by multiple of one hundred
![](https://mathta.wpenginepowered.com/wp-content/uploads/2022/12/Adding-three-digits-by-one-digit-a-727.png)
12) Add Three-Digit number
by One-Digit
12) Add Three-Digit number
by One-Digit
![adding three digits by two digits a adding three digits by two digits a](https://mathta.wpenginepowered.com/wp-content/uploads/2022/12/adding-three-digits-by-two-digits-a.png)
14) Add Three-Digit number
by Two-Digits
14) Add Three-Digit number
by Two-Digits
![](https://mathta.wpenginepowered.com/wp-content/uploads/2022/12/adding-three-digits-by-three-digits-1b.png)
15) Add Three-Digit number
by Three-Digits
15) Add Three-Digit number
by Three-Digits
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