4.8╳7.8╳0.52用简便计算怎么做?
5个回答
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4.8x7.8x0.52
=（5-0.2）x(8-0.2)x(0.5+0.02)
=(40-1-1.6+0.04)x(0.5+0.02)
=37.44x0.5+37.44x0.02
=18.72+0.7488
=19.4688
=（5-0.2）x(8-0.2)x(0.5+0.02)
=(40-1-1.6+0.04)x(0.5+0.02)
=37.44x0.5+37.44x0.02
=18.72+0.7488
=19.4688
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4.8*7.8*0.52
=4.8*7.8*(0.5+0.02)
=37.44*0.5+37.44*0.02
=18.72+0.7488
=19.4688
=4.8*7.8*(0.5+0.02)
=37.44*0.5+37.44*0.02
=18.72+0.7488
=19.4688
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4.8x7.8x0.52
=(0.78x5-0.78x2)x0.52
=(3.9-1.56)x0.52
=2.34x0.52
=0.234x5+0.234x0.2
=1.17+0.0468
=1.2168
=(0.78x5-0.78x2)x0.52
=(3.9-1.56)x0.52
=2.34x0.52
=0.234x5+0.234x0.2
=1.17+0.0468
=1.2168
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简便计算
4.8x7.8+78x0.52
=4.8x7.8+7.8x5.2
=(4.8+5.2)x7.8
=10x7.8
=78
4.8x7.8+78x0.52
=4.8x7.8+7.8x5.2
=(4.8+5.2)x7.8
=10x7.8
=78
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4.8x7.8x0.52
=(0.78x5-0.78x2)x0.52
=(3.9-1.56)x0.52
=2.34x0.52
=0.234x5+0.234x0.2
=1.17+0.0468
=1.2168
=(0.78x5-0.78x2)x0.52
=(3.9-1.56)x0.52
=2.34x0.52
=0.234x5+0.234x0.2
=1.17+0.0468
=1.2168
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