求10道数学计算题要带答案,过程,急
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-2³÷4/9×(-2/3)²
=-8×9/4×4/9
= -8
|(-5又1/3)-(-2又1/2)|+|-2²-(-2)²|
=2又5/6 +8
=10又5/6
1又1/2×5/7-(-5/7)×2又1/2+(-1/2)×5/7
=(1又1/2+2又1/2-1/2)×5/7
=7/2×5/7
=5/2
2×(-3)²-5÷1/2×2
=2×9-5×2×2
=18-20
=-2
-3²-50÷(-5)²-1
=-9-50÷25-1
=-12
-35÷(-7)×(-1/7)
=-35×1/7×1/7
=-35/49
7×[(-2)³-(-4)+|-2²|]
=7×(8+4+4)
=7×16
=112
(1/6+1/36-1/4+1/12)×(-48)
=1/6×(-48)+1/36×(-48)-1/4×(-48)+1/12×(-48)
=-8-4/3+12-4
=-4/3
=-8×9/4×4/9
= -8
|(-5又1/3)-(-2又1/2)|+|-2²-(-2)²|
=2又5/6 +8
=10又5/6
1又1/2×5/7-(-5/7)×2又1/2+(-1/2)×5/7
=(1又1/2+2又1/2-1/2)×5/7
=7/2×5/7
=5/2
2×(-3)²-5÷1/2×2
=2×9-5×2×2
=18-20
=-2
-3²-50÷(-5)²-1
=-9-50÷25-1
=-12
-35÷(-7)×(-1/7)
=-35×1/7×1/7
=-35/49
7×[(-2)³-(-4)+|-2²|]
=7×(8+4+4)
=7×16
=112
(1/6+1/36-1/4+1/12)×(-48)
=1/6×(-48)+1/36×(-48)-1/4×(-48)+1/12×(-48)
=-8-4/3+12-4
=-4/3
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