4.37乘0.55加56.3乘0.055简便计算
用简便方法计算下面各题.4.37×0.55+56.3×0.055;2.5×1.6×1.25;0.59×9.8;53.6×38.2+536×6.08+53.6....
用简便方法计算下面各题.
4.37×0.55+56.3×0.055;
2.5×1.6×1.25;
0.59×9.8;
53.6×38.2+536×6.08+53.6. 展开
4.37×0.55+56.3×0.055;
2.5×1.6×1.25;
0.59×9.8;
53.6×38.2+536×6.08+53.6. 展开
1个回答
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(1)4.37×0.55+56.3×0.055
=43.7×0.055+56.3×0.055
=(43.7+56.3)×0.055
=100×0.055
=5.5
(2)2.5×1.6×1.25
=2.5×2×0.8×1.25
=(2.5×2)×(0.8×1.25)
=5×1
=5
(3)0.59×9.8
=0.59×(10-0.2)
=0.59×10-0.59×0.2
=5.9-0.118
=5.782
(4)53.6×38.2+536×6.08+53.6
=53.6×38.2+53.6×60.8+53.6
=53.6×(38.2+60.8+1)
=53.6×100
=5360
=43.7×0.055+56.3×0.055
=(43.7+56.3)×0.055
=100×0.055
=5.5
(2)2.5×1.6×1.25
=2.5×2×0.8×1.25
=(2.5×2)×(0.8×1.25)
=5×1
=5
(3)0.59×9.8
=0.59×(10-0.2)
=0.59×10-0.59×0.2
=5.9-0.118
=5.782
(4)53.6×38.2+536×6.08+53.6
=53.6×38.2+53.6×60.8+53.6
=53.6×(38.2+60.8+1)
=53.6×100
=5360
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