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Example 1.62 from Prealgebra, 1.5 Divide Whole Numbers
Divide 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 6 into 4. | |
| Since that won't work, we try 6 into 45. There are 7 sixes in 45. We write the 7 over the 5. |
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| Multiply the 7 by 6 and subtract this product from 45. | |
| Now bring down the 0 and repeat these steps. There are 5 sixes in 30. Write the 5 over the 0. Multiply the 5 by 6 and subtract this product from 30. |
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| Now bring down the 6 and repeat these steps. There is 1 six in 6. Write the 1 over the 6. Multiply 1 by 6 and subtract this product from 6. |
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| Check by multiplying. |
It equals the dividend, so 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?