题目内容
| 计算下面各题,能简便运算的要简便运算. ①30-20.6÷2 | ②1.25×2.33×8 | ③0.35×201. |
①30-20.6÷2,
=30-10.3,
=19.7;
②1.25×2.33×8,
=1.25×8×2.33,
=10×2.33,
=23.3;
③0.35×201,
=0.35×(200+1),
=0.35×200+0.35×1,
=70+0.35,
=70.35.
=30-10.3,
=19.7;
②1.25×2.33×8,
=1.25×8×2.33,
=10×2.33,
=23.3;
③0.35×201,
=0.35×(200+1),
=0.35×200+0.35×1,
=70+0.35,
=70.35.
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