Final answer:
To use mental math to find the answer to 915 divided by 7, divide 915 by 10 to get 91.5, then divide 91.5 by 7 to get 13.
Step-by-step explanation:
To use mental math to find the answer to 915 divided by 7, you can use division by multiples of 10. Here are the steps:
- Recognize that 70 is divisible by 7.
- Divide 915 by 10 to get 91.5.
- Divide 91.5 by 7 to get 13.
Therefore, the answer to 915 divided by 7 is 13.