(得数保留一位小数)2.84×0.05= 1.204÷0.43= 2.08×7.5= 18.9÷0.54=1.05×2.4= 1.44÷1.8= 1.89÷0.54= 0.35×8.6=5.61÷6.1=(得数保留两位小数) 9.58÷0.23= 6.21÷0.3= 54÷0.36=
6.7×3.6﹣6.7×2.6.
78×(+)
计算1+7+3+9.
简便计算及解方程 222×999+333×33445×993(x+2)÷5=(x+2) 3(x+1)÷(2x﹣4)=67×( x﹣2 )=2x+3.
0.99999×0.06+0.11111×0.36.