题目内容
拌制36吨的混凝土,其中水泥占
,黄沙需7.2吨,其余的是石子,石子占
.
| 1 |
| 4 |
| () |
| () |
(36-36×
-7.2)÷36,
=(36-9-7.2)÷36,
=(27-7.2)÷36,
=19.8÷36,
=
,
答:石子占
.
| 1 |
| 4 |
=(36-9-7.2)÷36,
=(27-7.2)÷36,
=19.8÷36,
=
| 11 |
| 20 |
答:石子占
| 11 |
| 20 |
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