关于比和简算的数学问题.16.2÷0.375-1.2×8/3 (要简算) 4.72+3/40-1.72(要简算)甲是乙的1又3/5倍,乙:甲=( ):( )

问题描述:

关于比和简算的数学问题.
16.2÷0.375-1.2×8/3 (要简算) 4.72+3/40-1.72(要简算)
甲是乙的1又3/5倍,乙:甲=( ):( )

原式=16.2÷3/8-1.2×8/3
=16.2×8/3-1.2×8/3
=8/3(16.2-1.2 )
=8/3×15
=40
原式=4.72-1.72+3/40
=3+3/40
=123/40
甲是乙的1又3/5倍,乙:甲=( 8 ):( 5 )

16.2÷0.375-1.2×8/3 (要简算)
=16.2*8/3-1.2*8/3
=8/3*(16.2-1.2)
=8/3*15
=8*5
=40
4.72+3/40-1.72(要简算)
=4.72-1.72+3/40
=3+3/40
=3又3/40
甲是乙的1又3/5倍,乙:甲=( 8 ):( 5 )

16.2÷0.375-1.2×8/3 (要简算) =16.2÷(375/1000)-1.2*8/3=16.2×8/3-1.2×8/3=8/3×(16.2-1.2)=(8/3)×15=8×5=404.72+3/40-1.72(要简算)=4.72-1.72+3/40=3+3/40=3又3/40=123/40甲是乙的1又3/5倍,而1又3/5=8/...