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4.3×2.5+0.4×3的积的简便方法

022222

解: 2.5+4.3*0.4=2.5+1.72=4.22

4.78*2.5*0.4=2.5*0.4*4.78=1*4.78=4.78

2.5*0.4/2.5*0.4=2.5/2.5*0.4*0.4=1*0.16=0.16 不懂可追问,有帮助请采纳,谢谢!

(4+0.4)*2.5=10+1=11

4.3 / 2.5=43/25=(50-7)/25=2-0.28=1.72

3.8*2.5-4.3*0.07的简便方法=38*0.25-43*0.007=38/4-43*0.007=19/2-43*0.007=9.5-43*0.007=9.5-0.301=9.199

0.4x3.6x2.5=0.4x2.5x3.6=1x3.6=3.6

没法简算:25+43*04=2.5+1.72=4.22

(4-0.4)*2.5=4*2.5-0.4*0.25=10-1=9

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