题目内容
| 用递等式计算. 600-(4.06+6.4)×0.5 |
3.69×7.5+36.9×0.25. |
(1)600-(4.06+6.4)×0.5,
=600-10.46×0.5,
=600-5.23,
=594.77;
(2)3.69×7.5+36.9×0.25,
=3.69×7.5+3.69×2.5,
=3.69×(7.5+2.5),
=3.69×10,
=36.9.
=600-10.46×0.5,
=600-5.23,
=594.77;
(2)3.69×7.5+36.9×0.25,
=3.69×7.5+3.69×2.5,
=3.69×(7.5+2.5),
=3.69×10,
=36.9.
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