问题描述:
脱式计算(能简便就简便)
6.25÷1%-1.25×25×85/3×81+60%×194/3×4÷4×4/313/7+12.5%×13/65/4×3.5+5.5×80%+0.8
(27+19/18)÷981/5×3.6÷1又6/1
问题描述:
脱式计算(能简便就简便)
6.25÷1%-1.25×25×85/3×81+60%×194/3×4÷4×4/313/7+12.5%×13/65/4×3.5+5.5×80%+0.8
(27+19/18)÷981/5×3.6÷1又6/1
6.25÷1%-1.25×25×8 =625-(1.25×8)×25 =625-10×25 =625-250 =375 3/5×81+60%×19 =0.6×(81+19) =0.6×100 =60 4/3×4÷4×4/3 =4/3×4/3×(4÷4) =4/3×4/3 =16/9 13/7×12.5%+12.5%×13/6 =(13/7+13/6)×12.5% =1×12.5% =0.125 5/4×3.5+5.5×80%+0.8 =0.8×(3.5+5.5+1) =0.8×10 =8 (27+19/18)÷9 =27÷9+19/18÷9 =3+19/2 =3又19/2 81/5×3.6÷1又6/1 =9/2÷7/6 =9/2×6/7 =27/7