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1.87x9.9 0.187简便计算

1.87x9.9+0.187=1.87x9.9+1.87x0.1=1.87x(9.9+0.1)=18.7

=10x(1.87x9.9+0.187)/10 =(1.87x99+1.87)/10 =1.87x(99+1)/10 =18.7

1.87*9.9+0.187=1.87*9.9+0.187*1=1.87*9.9+1.87*0.1=1.87*(9.9+0.1)=1.87*1=1.87

8.7*9.9 =8.7x(10-0.1)=8.7x10-8.7x0.1=87-0.87=86.13 祝学习进步,望采纳~~不懂的还有追问

1.87x9.9+0.187=1.87x9.9+1.87x0.1=1.87x(9.9+0.1)=18.7

应该是1.87x9.9+0.187吧解:1.87x9.9+0.187=1.87x(10-0.1)+0.187=1.87x10-1.87x0.1+0.187=18.7-0.187+0.187=18.7

1.87*9.9+1.87+0.187=1.87*9.9+1.87+1.87*0.1=1.87*(9.9+0.1)+1.87=1.87*10+1.87=18.7+1.87=20.57

0.187(99+1)=18.7

1.87+9.9+0.187 =1.87÷10+9.9x10+0.187 =0.187+99十0.187 =0.187x2十99 =0.374+99 =99.374

1.87*(100-1)+0.187=187-1.87+0.187=187.187-1.87=185.317

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