题目内容
2.25×4
+77
×0.48-(9
×
+
×
).
| 4 |
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2.25×4
+77
×0.48-(9
×
+
×
),
=2.25×4.8+77.5×0.48-(9
×
+
×
),
=2.25×4.8+77.5×4.8-(9
+
)×
,
=(2.25+7.75)×4.8-10×
,
=48-
,
=47
.
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| 5 |
| 1 |
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| 8 |
| 17 |
| 2 |
| 23 |
| 2 |
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| 9 |
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=2.25×4.8+77.5×0.48-(9
| 8 |
| 17 |
| 2 |
| 23 |
| 9 |
| 17 |
| 2 |
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=2.25×4.8+77.5×4.8-(9
| 8 |
| 17 |
| 9 |
| 17 |
| 2 |
| 23 |
=(2.25+7.75)×4.8-10×
| 2 |
| 23 |
=48-
| 20 |
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=47
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