0.25十0.975x4简便运算

简便计算0.25+0.975x4=0.25+(1-0.025)x4=0.25+4-0.025x4=4.25-0.1=4.15

=0.25+(1-0.025)*4=0.25+1*4-0.025*4=0.25+4-0.1=4+0.25-0.1=4+0.15=4.15

0.25*0.975*4=0.25*4*0.975=1*0.975=0.975

0.25x0.975x4=0.25*4*0.975=1*0.975=0.975 此题应用乘法交换律

0.25*0.975*40 =(0.25*40)*0.975 =10*0.975 =9.75

解:0.25x0.975x40=(0.25x40)x0.975=10x0.975=9.75 打字不易,请采纳.

0.175÷0.25*4 =0.5*0.25÷0.25*4 =0.5*4 =2

0.175÷0.25*4=0.175*4*4=0.175*16=2.8 不要想得美,0.25是1/4,先跟后边的4相乘,那你就错了.

0.25x(4十0.4)=0.25x4+0.25x0.4=1+0.1=1.10.25x(4十0.4)=0.25x4.4=1.1

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