简算:1.9+(12.8-3.8)*1.9
简算:1.9+(12.8-3.8)*1.9
(1.9-1.9*0.9)/(3.8-2.8)简便运算
(3.8+3.4*3.8+3.8*5.6)/(1.9*0.8*0.25)
4.3*1.9简算
1.9+19.9+199.9+1999.9简算
48*2.7+16*1.9简算
(7.2×3.8)÷(3.6×1.9)简便计算
计算(+1.9)+3.8+(-0.9)+6.2-(-3)
简算41.2*8.1+11*9.25+53.7*1.9
93.7 5.55-1.8 +4.45-1.9 简算
0.9+1.9+29.9+399.9+4999.9简算
20.09×37+200.9×1.9+2009×0.82简算