题目内容
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4.72-1.16-2.84
2-
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| 26 |
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| 2 |
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375+450÷18×25
3（x-2.1）=8.4
x-
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| 3 |
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| 8 |
| 1 |
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=
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| 1 |
| 8 |
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=
| 4 |
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=
| 256 |
| 25 |
4.72-1.16-2.84，
=4.72-（1.16+2.84），
=4.72-4，
=0.72；
2-
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| 13 |
| 26 |
| 9 |
| 2 |
| 3 |
=2-（
| 4 |
| 3 |
| 2 |
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=2-2，
=0；
375+450÷18×25
=375+25×25
=375+625
=1000；
3（x-2.1）=8.4，
x-2.1=2.8，
x=2.8+2.1，
x=4.9；
x-
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x=
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x=
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