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(1)(-16-50+3又5分之2)÷(-2)(2)(-6)×8-(-2)³-(-4)²×5

来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/15 17:29:34
(1)(-16-50+3又5分之2)÷(-2)(2)(-6)×8-(-2)³-(-4)²×5
(3)(-2分之1)²+2分之1×(3分之2-│3分之2-2│)(4)-1-(1-0.5)×3分之1
(1) (-16-50+3又5分之2)÷(-2)
=(-66+17/5)÷(-2)
=33-17/10
=313/10
=31.3
(2) (-6)×8-(-2)³-(-4)²×5
=-48+8-16×5
=-40-80
=-120
(3) (-2分之1)²+2分之1×(3分之2-│3分之2-2│)
=1/4+1/2×(2/3-2+2/3)
=1/4+1/2×(4/3-2)
=1/4+(2/3-1)
=1/4+2/3-1
=-1/12
(4) -1-(1-0.5)×3分之1
=-1-0.5×1/3
=-1-1/6
=-7/6