2.5×(1.9+1.9+1.9+1.9)
简算:1.9+(12.8-3.8)*1.9
(6.9-3.15)÷0.3×0.8 2.5×(1.9+1.9+1.9+1.9)简便计算要怎么算啊
7.6乘2分之1除【1.9减1.9乘(1.9减1.9)】简便计算
简便运算 90.78*99+90.7 1.9-1.9*(1.9-1.9) 1.8/1.5-0.5*0.3 (12.5+0
简便运算,一共6道2.5×(1.9+1.9+1.9+1.9) 5/9-3/8+11/18-5/8 7/29×3/8+6/
(1.9-1.9*0.9)/(3.8-2.8)简便运算
1.23÷1.9+1.9-0.73÷1.9怎样简便计算
2.6×1.9-0.6×1.9-1.9 5.6×0.99 求简便计算
简便方法计算:7.5×2.7+1.9×2.5
1.9×2.5+0.25的简便运算
1.9除以2.5怎么简便计算
[1.9+1.9*(4.8-3.81)]/(2.9-2.8)