①5.2×1
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| 4 |
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| 4 |
| 5 |
②2
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| 8 |
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| 1 |
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| 6 |
③[3.75-(
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④
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⑤(7
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⑥
9
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9
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⑦(
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| 35 |
| 21 |
| 30 |
⑧1
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| 42 |
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| 4 |
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=5.2×
| 5 |
| 4 |
| 5 |
| 4 |
=(5.2+2.8)×
| 5 |
| 4 |
=8×
| 5 |
| 4 |
=10;
②2
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| 8 |
| 2 |
| 3 |
| 1 |
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| 5 |
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=2
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| 8 |
| 12 |
| 3 |
| 12 |
| 10 |
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=2
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| 8 |
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=
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③[3.75-(
| 1 |
| 5 |
| 1 |
| 3 |
| 1 |
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| 3 |
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=[3.75-
| 8 |
| 15 |
| 9 |
| 2 |
| 3 |
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=[3.75-2.4]÷0.6,
=1.35÷0.6,
=2.25;
④
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| 4 |
| 1 |
| 8 |
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=
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| 1 |
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=
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| 1 |
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=
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=
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⑤(7
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
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=7
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=7
| 1 |
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=7
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⑥
9
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9
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=
(9+8-7)+(
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(9-5+6)+(
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=
10+(
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10+(
|
=1;
⑦(
| 14 |
| 35 |
| 21 |
| 30 |
=(0.4×4.27+8.54×0.7)÷4.27×0.25,
=(1.708+5.978)×0.25÷4.27,
=7.686×0.25÷4.27,
=1.9215÷4.27,
=0.45;
⑧1
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
| 1 |
| 30 |
| 1 |
| 42 |
=(1+3+5+7+9)+(
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
| 1 |
| 30 |
| 1 |
| 42 |
=25+(
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
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| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 5 |
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| 6 |
| 1 |
| 6 |
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=25+(
| 1 |
| 2 |
| 1 |
| 7 |
=25+
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| 14 |
=25
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| 14 |