(3.8+3.4*3.8+3.8*5.6)/(1.9*0.8*0.25)
(3.8+3.4*3.8+3.8*5.6)/(1.9*0.8*0.25)
简算:1.9+(12.8-3.8)*1.9
(1.9-1.9*0.9)/(3.8-2.8)简便运算
0.25×(3.8×4)简便算法
1:5.6*0.25= 2:5.4*3.8-6.5*4.4+2.7*5.4= (都要巧算哦!)
0.1.3.8.22.63.()
(3.4*3.8*9.5)/(1.9*1.7*2.4)怎么样简便计算
0.45×[4.85÷﹙3.8÷1.9)+3.6-1.56×2.07]=
5.6x-3.8=1.8(解方程请讲详细一点谢谢)
(7.2×3.8)÷(3.6×1.9)简便计算
计算(+1.9)+3.8+(-0.9)+6.2-(-3)
找规律 0.1.3.8.21.55.( )