1-(5/7+3/14÷3/4)×2/7简算
1-(5/7+3/14÷3/4)×2/7简算
1-(5/7+3/14÷3/4)×2/7
=1-(5/7+2/7)x2/7
=1-1x2/7
=1-2/7
=5/7
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[1-(5/7+3/14÷3/4)]×16/7=
=0
(3/5-3/4*5/3)/1/5, 8/7*(21/8-7/4)/2/3,能简算要简算
(3/5-3/4*5/3)/1/5 =(3/5-3/4*5/3)*5 =(3/5-5/4)*5 =3-25/4 =12/4-25/4 =-13/4 =-3又4分之1 8/7*(21/8-7/4)/2/3 =(8/7*21/8-8/7*7/4)*3/2 =(3-2)*3/2 =3/2 =1又2分之1
3/5*4/7+3/7*1-1/5怎么简算
=1/5*12/7-1/5+3/7
=1/5(12/7-1)+3/7
=1/5*5/7+3/7
=1/7+3/7
=4/7
3/8*2/7+5/7*5/8 简算
3/8*2/7+5/7*5/8
=6/56+25/56
=31/56
[1-(1/2+1/3)×1/5]÷5/6和(2/3-12/7×7/24)÷7/3 简算
[1-(1/2+1/3)×1/5]÷5/6
=(1-1/6×1/5)×6/5
=1×6/5-1/30×6/5
=30/25-1/25
=29/25
(2/3-12/7×7/24)÷7/3
=(2/3-1/2)×3/7
=2/3×3/7-1/2×3/7
=4/14-3/14
=1/14
(5.87+1又5/14+2.13+9/14)×(2又3/4-1.75)+(1÷2/7-3.5)×3.99简算
(5.87+1又5/14+2.13+9/14)×(2又3/4-1.75)+(1÷2/7-3.5)×3.99
=(5.87+2.13+1+5/14+9/14)×(2.75-1.75)+(1x7/2-3.5)×3.99
=(8+1+14/14)x1+0
=10
解比例3/54%=5.7*5/19 能简算的要简算【5又4/9-(4又4/9+4/7)】/8/7 18.2*1/7+3/4/3
12/23*(3.25-4/3)+3.9)=12/23*(13/4-4/3)+3.9=12/23*(39/12-16/12)+3.9=12/23*23/12+3.9=1+3.9=4.9
(4又3/5+3又2/7)÷(2/5+2/7)简算
原式=(23/5+23/7)÷【2×(1/5+1/7)】
=【23×(1/5+1/7)】÷【2×(1/5+1/7)】
=23÷2
=11.5
(5/4+4/1) ÷3/7 +10/7简算
本题不具备简便计算特征,不适宜用简便方法计算。按混和运算顺序算。