3.9*2.8-8.9*2.9+3.9*6.1(巧算)
3.9*2.8-8.9*2.9+3.9*6.1(巧算)
巧算 46+32+54 546+785-146 0.7+3.9+4.3+6.1 25*49*4 8* (36*125)
3.9-0.45+6.1-0.55的简便计算
简算:3.9-4.1+6.1-5.9
54.9×0.38 6.8×25 4.05+37.38 6.1×3.6+3.6×3.9
用简便算法27.6-3.9-17.6-6.1=
7.8乘以6.1+7.8+3.9的简便算法谢谢了,
用简便方法计算19.5-1.9-2.9-3.9
6.8-3.9*4/13+2.8 用简便方法计算
3.9-3.9×0.5简便计算
用简便计算:10.1*27 13.7*6.1+3.9*13.7 87.5*0.05*2
3.9—4.1+6.1—5.9=( )递等式计算