(1)1-1/2-0.4=1-(0.5+0.4)=1-0.9=0.1
(2)3/4×80%=3/4x4/5=3/5
(3)5/6×18%=5/6x18/100=5/6x9/50=3/20
(4)24×(1/4-1/6)=24x1/4-24x1/6=6-4=2
(5)3.5×30%+6.5×3/10=3.5x3/10+6.5x3/10=(3.5+6.5)x3/10=10x3/10=3
满意吗?等一下再做下一题
(1)1-1/2-0.4=1-(0.5+0.4)=1-0.9=0.1
(2)3/4×80%=3/4x4/5=3/5
(3)5/6×18%=5/6x18/100=5/6x9/50=3/20
(4)24×(1/4-1/6)=24x1/4-24x1/6=6-4=2
(5)3.5×30%+6.5×3/10=3.5x3/10+6.5x3/10=(3.5+6.5)x3/10=10x3/10=3
满意吗?等一下再做下一题