数学题!~!计算
1、375÷(-2/3)÷3/22、-15/8÷15/4×(-10/3)3、23/6÷(-3/4)×2/34、(-12)÷(-15)÷(-1+3/5)5、[(1/4+1/...
1、375 ÷(-2/3)÷ 3/2
2、-15/8 ÷ 15/4 × (-10/3)
3、23/6 ÷ (-3/4)× 2/3
4、(-12)÷ (-15)÷ (-1+3/5)
5、[ (1/4+1/6) - 1/2] × (-12)
6、-8 - [ 7/25 + (-2/5)³ ] × (-5)³
7、(-12)÷ (-15)÷ (-1+3/5)× 1/2
8、(-3)² +(-3/2)³ × 2/9 - 6 ÷ |-2/3|
9、22/7 × (-88/21)× (-7/27)× (-21/22)
10、-2³ × 0.5 - [ 4÷(-2/3)² × 9 +5 ×(-2)³ ]- 4²
11、(-13/3)×7/2 - 5/9 × 13/3
请直接写出得数就可以了,谢谢!~
PS:| |这个是绝对值
x/x 这个是分数 例如:2/3 (等于三分之二) 展开
2、-15/8 ÷ 15/4 × (-10/3)
3、23/6 ÷ (-3/4)× 2/3
4、(-12)÷ (-15)÷ (-1+3/5)
5、[ (1/4+1/6) - 1/2] × (-12)
6、-8 - [ 7/25 + (-2/5)³ ] × (-5)³
7、(-12)÷ (-15)÷ (-1+3/5)× 1/2
8、(-3)² +(-3/2)³ × 2/9 - 6 ÷ |-2/3|
9、22/7 × (-88/21)× (-7/27)× (-21/22)
10、-2³ × 0.5 - [ 4÷(-2/3)² × 9 +5 ×(-2)³ ]- 4²
11、(-13/3)×7/2 - 5/9 × 13/3
请直接写出得数就可以了,谢谢!~
PS:| |这个是绝对值
x/x 这个是分数 例如:2/3 (等于三分之二) 展开
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解:
1、375 ÷(-2/3)÷ 3/2=-375
2、-15/8 ÷ 15/4 × (-10/3)
=(15/8)×(4/15)×(10/3)
=5/3
3、23/6 ÷ (-3/4)× 2/3
=(23/6)×(-4/3)×(2/3)
=-92/27
4、(-12)÷ (-15)÷ (-1+3/5)
=(4/5)×(-5/2)
=-2
5、[ (1/4+1/6) - 1/2] × (-12)=1
6、-8 - [ 7/25 + (-2/5)³ ] × (-5)³
=-8-(27/125)×(-125)
=-8+27
=19
7、(-12)÷ (-15)÷ (-1+3/5)× 1/2
=(4/5)×(-5/2)×1/2
=-1
8、(-3)² +(-3/2)³ × 2/9 - 6 ÷ |-2/3|
=9-(27/8)×2/9-9
=-3/4
9、22/7 × (-88/21)× (-7/27)× (-21/22)
=-3×(88/21)×(7/27)
=-616/189
10、-2³ × 0.5 - [ 4÷(-2/3)² × 9 +5 ×(-2)³ ]- 4²
=-4-[81-40]-16
=-61
11、(-13/3)×7/2 - 5/9 × 13/3
=(13/3)(-7/2-5/9)
=(13/3)(-73/18)
=-949/54
谢谢
1、375 ÷(-2/3)÷ 3/2=-375
2、-15/8 ÷ 15/4 × (-10/3)
=(15/8)×(4/15)×(10/3)
=5/3
3、23/6 ÷ (-3/4)× 2/3
=(23/6)×(-4/3)×(2/3)
=-92/27
4、(-12)÷ (-15)÷ (-1+3/5)
=(4/5)×(-5/2)
=-2
5、[ (1/4+1/6) - 1/2] × (-12)=1
6、-8 - [ 7/25 + (-2/5)³ ] × (-5)³
=-8-(27/125)×(-125)
=-8+27
=19
7、(-12)÷ (-15)÷ (-1+3/5)× 1/2
=(4/5)×(-5/2)×1/2
=-1
8、(-3)² +(-3/2)³ × 2/9 - 6 ÷ |-2/3|
=9-(27/8)×2/9-9
=-3/4
9、22/7 × (-88/21)× (-7/27)× (-21/22)
=-3×(88/21)×(7/27)
=-616/189
10、-2³ × 0.5 - [ 4÷(-2/3)² × 9 +5 ×(-2)³ ]- 4²
=-4-[81-40]-16
=-61
11、(-13/3)×7/2 - 5/9 × 13/3
=(13/3)(-7/2-5/9)
=(13/3)(-73/18)
=-949/54
谢谢
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