Question

简便运算（-3/4-5/6+7/8）*（-24） (-3/5)*3/5+8/25*(-24) (2*3*4*5 )*(1/2+1/3+1/4+1/5)

简便运算（-3/4-5/6+7/8）*（-24） (-3/5)*3/5+8/25*(-24)
(2*3*4*5 )*(1/2+1/3+1/4+1/5) 有过程
注———比如3/5的意思是三分之五

Answer 1

（-3/4-5/6+7/8）*（-24）
=-3/4*（-24）-5/6*（-24）+7/8*（-24）
=18+20-21
=17

(-3/5)*3/5+8/25*(-24)
=-9/25-8*24/25
=-3*3/25-64*3/25
=（-3-64）*3/25
=-67*3/25
=-201/25
=-8又1/25

(2*3*4*5 )*(1/2+1/3+1/4+1/5)
=(2*3*4*5 )*1/2+(2*3*4*5 )*1/3+(2*3*4*5 )*1/4+(2*3*4*5 )*1/5
=3*4*5+2*4*5+2*3*5+2*3*4
=60+40+30+24
=154

Answer 2

（-3/4-5/6+7/8）*（-24）=(1/8-5/6)*(-24)=-3+20=17
(-3/5)*3/5+8/25*(-24)=1/25*(-9-8*24)=-201/25
(2*3*4*5 )*(1/2+1/3+1/4+1/5)=3*4*5+2*4*5+2*3*5+2*3*4=60+40+30+24=154

Answer 3

简便运算:
（-3/4-5/6+7/8）*（-24）
=-3/4*（-24）-5/6*（-24）+7/8*（-24）
=18+20-21
=17

(-3/5)*3/5+8/25*(-24)
=-9/25-8*24/25
=-3*3/25-64*3/25
=（-3-64）*3/25
=-67*3/25
=-201/25

(2*3*4*5 )*(1/2+1/3+1/4+1/5)
=(2*3*4*5 )*1/2+(2*3*4*5 )*1/3+(2*3*4*5 )*1/4+(2*3*4*5 )*1/5
=3*4*5+2*4*5+2*3*5+2*3*4
=60+40+30+24
=154

Answer 4

（-3/4-5/6+7/8）*（-24）
=-3/4*（-24）-5/6*（-24）+7/8*（-24）
=18+20-21
=17

(-3/5)*3/5+8/25*(-24)
=-9/25-8*24/25
=-3*3/25-64*3/25
=（-3-64）*3/25
=-67*3/25
=-201/25
=-8又1/25
``````````````
(2*3*4*5 )*(1/2+1/3+1/4+1/5)
=(2*3*4*5 )*1/2+(2*3*4*5 )*1/3+(2*3*4*5 )*1/4+(2*3*4*5 )*1/5
=3*4*5+2*4*5+2*3*5+2*3*4
=60+40+30+24
=154
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