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1.9x9.9+0.19用简便的脱式计算

1.9乘9.9加1.9乘0.1

1.9x(0.13+0.77) =1.9X0.9 =1.9X1-1.9X0.1 =1.9-0.19 =1.71

原式=1.9×(1-0.9) =1.9×0.1 =0.19

0.46+0.54括号x1.9

19.7x9.9+19.7用脱式计算 =19.7x(10-0.1)+19.7 =19.7x10-19.7x0.1+19.7 =197-1.97+19.7 =195.03+19.7 =214.73

9.9×5.5+0.1x5.5 =(9.9+0.1)×5.5 =1x5.5 =5.5

9×9加19 =81+19 =100 请采纳正确答案,你们只提问,不采纳正确答案,回答都没有劲!谢谢管理员推荐采纳!! 朋友,请【采纳答案】,您的采纳是我答题的动力,如果没有明白,请追问。谢谢。

=3.62*9.9+3.62*0.1 =3.62*(9.9+0.1) =3.62*10 =36.2

自己算吧

1.9+19点9+199点9+0点3 =2-0.1+20-0.1+200-0.1+0.3 =(2+20+200)-(0.1+0.1+0.1)+0.3 =222-0.3+0.3 =222

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