题目内容
3
÷4+51×25%+0.25×2525%．
| 3 |
| 4 |
3
÷4+51×25%+0.25×2525%，
=3
×
+51×25%+0.25×2525%，
=3.75×0.25+51×0.25+0.25×25.25，
=（3.75+25.25+51）×0.25，
=80×0.25，
=20．
| 3 |
| 4 |
=3
| 3 |
| 4 |
| 1 |
| 4 |
=3.75×0.25+51×0.25+0.25×25.25，
=（3.75+25.25+51）×0.25，
=80×0.25，
=20．
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