1.64除以0.8除以8.2简便计算
问题描述:
1.64除以0.8除以8.2简便计算
还有0.99x0.1+9x9.9简便计算
答
1.64÷0.8÷0.82
=1.64÷0.82÷0.8
=2÷0.8
=2.5
0.99x0.1+9x9.9
=0.99x0.1+9x(10-0.1)
=0.099+90-0.9
=89.199