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计算,能简算的用简便方法计算.375+450÷18×209.47+0.58-2.47×8.4+1.6×0.7÷[×(+)].
题目详情
计算,能简算的用简便方法计算. 375+450÷18×20 | 9.47+0.58-2.47 |
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▼优质解答
答案和解析
(1)375+450÷18×20,
=375+25×20,
=375+500,
=875;
(2)9.47+0.58-2.47,
=9.47-2.47+0.58,
=7+0.58,
=7.58;
(3)
×8.4+1.6×0.7,
=0.7×(8.4+1.6),
=0.7×10,
=7;
(4)
÷[
×(
+
)],
=
÷[
×
],
=
÷
,
=
.
=375+25×20,
=375+500,
=875;
(2)9.47+0.58-2.47,
=9.47-2.47+0.58,
=7+0.58,
=7.58;
(3)

=0.7×(8.4+1.6),
=0.7×10,
=7;
(4)




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