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Example 1.65 from Prealgebra, 1.5 Divide Whole Numbers
Divide and then check by multiplying:
Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.
| Let's rewrite the problem to set it up for long division. | |
| First we try to divide 13 into 1. Since that won't work, we try 13 into 14. There is 1 thirteen in 14. We write the 1 over the 4. |
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| Multiply the 1 by 13 and subtract this product from 14. | |
| Now bring down the 6 and repeat these steps. There is 1 thirteen in 16. Write the 1 over the 6. Multiply the 1 by 13 and subtract this product from 16. |
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| Now bring down the 1 and repeat these steps. There are 2 thirteens in 31. Write the 2 over the 1. Multiply the 2 by 13 and subtract this product from 31. There are no more numbers to bring down, so we are done. The remainder is 5. is 112 with a remainder of 5. |
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| Check by multiplying. |
Our answer is correct.
The book's Try It right after this example: same idea, new numbers. Only the answer is given.
Divide. Then check by multiplying:
How did it go?