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0除[(-10又2/3)x89];(+15)x5又10/11x(-89.2)x0x(-9又6/7);(5/12-7/9-2/3)除(-1/36);5/6除[-8/21x(-1又3/4)-0.25]x(-2又2/5);(5/6-2/5+8/15-2/3)除(-1/30);-4除[1.25-(1又1/4-2)除1/8]分子前

题目详情
0除[(-10又2/3)x89]; (+15)x5又10/11x(-89.2)x0x(-9又6/7); (5/12-7/9-2/3)除(-1/36);
5/6除[-8/21x(-1又3/4)-0.25]x(-2又2/5); (5/6-2/5+8/15-2/3)除(-1/30);
-4除[1.25-(1又1/4-2)除1/8]
分子前 分母后
▼优质解答
答案和解析
0除[(-10又2/3)x89];
=0
(+15)x5又10/11x(-89.2)x0x(-9又6/7);
=0
(5/12-7/9-2/3)除(-1/36);
=(5/12-7/9-2/3)×(-36)
=--15+28+24
=37
5/6除[-8/21x(-1又3/4)-0.25]x(-2又2/5);
=5/6÷[-8/21×(-7/4)-1/4]×(-12/5)
=5/6÷(2/3-1/4)×(-12/5)
=5/6÷5/12×(-12/5)
=5/6×12/5×(-12/5)
=2×(-12/5)
=-24/5
(5/6-2/5+8/15-2/3)除(-1/30);
=(5/6-2/5+8/15-2/3)×(-30)
=-25+12-16+20
=-9
-4除[1.25-(1又1/4-2)除1/8]
=-4÷[1.25-(-3/4)×8]
=-4÷(1.25+6)
=-4÷7.又4分之1
=-4×4/29
=-16/29
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