Add More Than 2 Numbers

6 + 14 = 20. I made a ten by adding 6 + 4, then added another 10.

34 + 16 = 50. I broke 16 up in 10 and 6. 34 + 6 = 40. 40 + 10 = 50.

Break 21 into 2 tens and 1 one. Break 63 into 6 tens and 3 ones. Add the ones: 2 + 1 = 3. Add the tens: 6 + 3 = 9. So, the solution is 3 ones and 9 tens, which is 93.

Break 43 into 4 tens and 3 ones. Break 49 into 4 tens and 9 ones. Add the ones: 3 + 9 = 12. Add the tens: 4 + 4 = 8. This are 12 ones and 8 tens. Regroup 10 ones into 1 ten. The total is 2 ones and 9 tens, which is 92.

Break 315 into 3 hundreds, 1 ten, and 5 ones. Break 134 into 1 hundred, 3 tens, and 4 ones. Add the ones: 5 + 4 = 9. Add the tens: 1 + 3 = 4. Add the hundreds: 3 + 1 = 4. So, the solution is 4 hundreds, 4 tens, and 9 ones, which is 449.

Add 6 + 5 = 11. Then, add the third number. 11 + 7 = 18. The sum is 18.

Add 15 + 5 first. 15 + 5 = 20. Then, add the other number. 20 + 47 = 67. The sum is 67.

First, add 13 + 7 and 19 + 21. I know that 13 + 7 = 20. Add 19 + 21 = 19 + 1 + 20 = 20 + 20 = 40. Then, add 20 + 40 = 60. The sum is 60.

I can start with any two numbers. I start with 14 + 13 = 27. Then, add in the next number. 27 + 21 = 48. Then, add the last number. 48 + 10 = 58.

I can start with any two numbers. I start with 212 + 214 = 426. Then, add in the third number. 426 + 330 = 756.