数学简便运算.(用脱式计算)
问题描述：
数学简便运算.(用脱式计算)
8.4÷1.4÷3
0.84÷2.5
0.99÷15
0.36×102+0.28
8.2×0.99+0.8×0.99+0.99
答
8.4÷1.4÷3 =8.4÷(1.4*3 )=8.4÷4.2=50.84÷2.5 =0.84÷10*4=0.084*4=3.360.99÷15 =0.99÷3÷5=0.33÷5=0.33÷10*2=0.033*2=0.0660.36×102+0.28 =0.36×(100+2)+0.28 =0.36×100+0.36×2+0.28 =36+(0.72+0.28)=3...