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0.38x2.03先计算再验算

1.131除以.2.9等于0.39

0.38X2.4+0.57用简便计算0.38X2.4+0.57=0.912+0.57=1.482供参考

答: 0.39x 2.9=1.131; 0.58x 0.08= 0.0464; 3.7x 200 =740; 0.18 X8.45=1.521; 4.5 *0.002=0.009; 0.072* 0.15=0.0108. 谢谢~

作业君找到的参考例题: 【问题】:先计算,再验算 0.39x 2.9 0.58x 0.08 3.7 先计算,再验算 0.39x 2.9 0.58x 0.08 3.7x 200 0.18 X8.45 4.5 *0.002 0.072* 0.15 【答案】:答: 0.39x 2.9=1.131; 0.58x 0.08=

37 19 x 76 x 63 ----------------- -------------- 计算方法:先乘以个位再乘以十位数错位相加很简单.提示:小九九口决应该会,这两道题不难,用计算器算吧!一算就出结果.

1.131 1.521 0.464 0.009 740 0.0072已i验算.

解:计算:0.58*0.08=0.0464 验算:0.08*0.58=0.0464 或者:0.0464÷0.08=0.58 或者:0.0464÷0.58=0.08

0.38*0.16的竖式计算:所以,0.38*0.16=0.0608

=0.19*4.79*4*1.25=0.19*4.79*5=0.95*4.79=(1-0.05)*4.79=4.79-0.05*4.79=4.79-0.2395=4.5505

0.38*【6.2-1.2】=0.38*5=19

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