Question

这些算式怎么简便计算？

0.8*32+3.2*2

2.6*3.7+26*0.63

53*64+0.53*3600

Answer 1

0.8*32+3.2*2
=0.8*32+32*0.2
=32*(0.8+0.2)
=32*1
=32

2.6*3.7+26*0.63
=26*0.37+26*0.62
=26*(0.37+0.63)
=26*1
=26

53*64+0.53*3600
=53*64+53*36
=53*(64+36)
=53*100
=5300

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Answer 2

0.8*32+3.2*2
=0.8*32+32*0.2
=32*(0.8+0.2)
=32*1
=32

2.6*3.7+26*0.63
=26*0.37+26*0.62
=26*(0.37+0.63)
=26*1
=26

53*64+0.53*3600
=53*64+53*36
=53*(64+36)
=53*100
=5300

Answer 3

0.8*32+3.2*2
=0.8*32+(0.2*16)*2
=0.8*32+0.2*32
=(0.8+0.2)*32
=1*32
=32

2.6*3.7+26*0.63
=2.6*3.7+2.6*10*0.63
=2.6*(3.7+6.3)
=2.6*10
=26

53*64+0.53*3600
=53*64+0.53*100*36
=53*64+53*36
=53*(64+36)
=53*100
=5300

Answer 4

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