2.6×1.7+1.35×1.7简算
计算下面各题,能简算的要简算.2.5×32×1.2523.4÷7.8-2.8145.6÷2.5÷0.42.65×1.7+1.35×1.729.6-19+42÷40....
计算下面各题,能简算的要简算.
2.5×32×1.25
23.4÷7.8-2.81
45.6÷2.5÷0.4
2.65×1.7+1.35×1.7
29.6-19+42÷40. 展开
2.5×32×1.25
23.4÷7.8-2.81
45.6÷2.5÷0.4
2.65×1.7+1.35×1.7
29.6-19+42÷40. 展开
1个回答
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①2.5×32×1.25
=2.5×(4×8)×1.25
=2.5×4×(8×1.25)
=10×10
=100
②23.4÷7.8-2.81
=3-2.81
=0.19
③45.6÷2.5÷0.4
=45.6÷(2.5×0.4)
=45.6÷1
=45.6
④2.65×1.7+1.35×1.7
=(2.65+1.35)×1.7
=4×1.7
=6.8
⑤29.6-19+42÷40
=10.6+1.05
=11.65
=2.5×(4×8)×1.25
=2.5×4×(8×1.25)
=10×10
=100
②23.4÷7.8-2.81
=3-2.81
=0.19
③45.6÷2.5÷0.4
=45.6÷(2.5×0.4)
=45.6÷1
=45.6
④2.65×1.7+1.35×1.7
=(2.65+1.35)×1.7
=4×1.7
=6.8
⑤29.6-19+42÷40
=10.6+1.05
=11.65
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