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Subtract and then check by adding:
439 − 52 = 387 because 387 + 52 = 439
Subtract and then check by adding:
318 − 75 = 243 because 243 + 75 = 318
Subtract and then check by adding:
| Write the numbers so each place value lines up vertically. |
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| Subtract the ones. We cannot subtract 6 from 0, so we borrow 1 ten and add 10 ones to the 10 ones we had. This makes 10 ones. We write a 0 above the tens place and cross out the 1. We write the 10 above the ones place and cross out the 0. Now we can subtract the ones. |
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| Write the 4 in the ones place of the difference. |
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| Subtract the tens. We cannot subtract 8 from 0, so we borrow 1 hundred and add 10 tens to the 0 tens we had, which gives us 10 tens. Write 8 above the hundreds place and cross out the 9. Write 10 above the tens place. |
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| Now we can subtract the tens. . |
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| Subtract the hundreds place. Write the 3 in the hundreds place in the difference. |
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Check by adding.
Our answer is correct. |
Subtract and then check by adding:
832 − 376 = 456 because 456 + 376 = 832
Subtract and then check by adding:
847 − 578 = 269 because 269 + 578 = 847
Subtract and then check by adding:
| Write the numbers so each place values line up vertically. |
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| Subtract the ones. Since we cannot subtract 9 from 2, borrow 1 ten and add 10 ones to the 2 ones to make 12 ones. Write 5 above the tens place and cross out the 6. Write 12 above the ones place and cross out the 2. |
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| Now we can subtract the ones. | |
| Write 3 in the ones place in the difference. |
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| Subtract the tens. Since we cannot subtract 7 from 5, borrow 1 hundred and add 10 tens to the 5 tens to make 15 tens. Write 0 above the hundreds place and cross out the 1. Write 15 above the tens place. |
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| Now we can subtract the tens. | |
| Write 8 in the tens place in the difference. |
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| Now we can subtract the hundreds. |
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| Write 6 in the hundreds place in the difference. |
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| Subtract the thousands. There is no digit in the thousands place of the bottom number, so we imagine a 0. Write 1 in the thousands place of the difference. |
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| Check by adding.
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Our answer is correct.
Subtract and then check by adding:
4,585 − 697 = 3,888 because 3,888 + 697 = 4,585
Subtract and then check by adding:
5,637 − 899 = 4,738 because 4,738 + 899 = 5,637
As with addition, word phrases can tell us to operate on two numbers using subtraction. To translate from a word phrase to math notation, we look for key words that indicate subtraction. Some of the words that indicate subtraction are listed in [link] .
| Operation | Word Phrase | Example | Expression |
|---|---|---|---|
| Subtraction | minus | minus | |
| difference | the difference of and | ||
| decreased by | decreased by | ||
| less than | less than | ||
| subtracted from | subtracted from |
Translate and then simplify:
The word difference tells us to subtract the two numbers. The numbers stay in the same order as in the phrase.
| the difference of 13 and 8 | |
| Translate. | |
| Simplify. | 5 |
The words subtract from tells us to take the second number away from the first. We must be careful to get the order correct.
| subtract 24 from 43 | |
| Translate. | |
| Simplify. | 19 |
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