这几道计算题,求大神解答。求学霸解答
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-0.5-(-3又1/4)+2.75-(+7又1/2)
=(3又1/4+2.75)+(-0.5-7又1/2)
=6-8
=-2
(-2/3)÷(-8/5)÷(-1/4)
=-2/3×5/8×4
=-5/3
5-3÷2×1/2-|-2³|÷(-1/2)
=5-3/2×1/2-8÷(-1/2)
=5-3/4+16
=20又1/4
【-0.5²+(-1/2)³-|-2³-4|+(2又1/4)²×16/27】÷0.12
=【-0.25-1/8-|-8-4|+81/16×16/27】÷0.12
=【-0.25-1/8-12+3】÷0.12
=-9.375÷0.12
=-78.125
=(3又1/4+2.75)+(-0.5-7又1/2)
=6-8
=-2
(-2/3)÷(-8/5)÷(-1/4)
=-2/3×5/8×4
=-5/3
5-3÷2×1/2-|-2³|÷(-1/2)
=5-3/2×1/2-8÷(-1/2)
=5-3/4+16
=20又1/4
【-0.5²+(-1/2)³-|-2³-4|+(2又1/4)²×16/27】÷0.12
=【-0.25-1/8-|-8-4|+81/16×16/27】÷0.12
=【-0.25-1/8-12+3】÷0.12
=-9.375÷0.12
=-78.125
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