问题补充说明:有理数计算题... 有理数计算题 展开
—|﹣2/3|-|-1/2×2/3|-|1/3-1/4|-|-3|
=-2/3-|-1/3|-|1/12|-3
=-2/3-1/3-1/12-3
=-1-3-1/12
=-4-1/12
=-49/12
(13/4-7/8-7/12)÷(-7/8)+(-7/8)÷(13/4-7/8-7/12)
=(7/4-7/8-7/1念2)*(-8/7)+(-7/8)/(7/4-7/8-7/12)
=7*(1/4-1/8-1/12)*(-8360问答/7)+(-7/8)/[7*(1/4-1/8-1/12)]
=-8*(1/8-1/12)+(-1/8)/(1/8-1/12)
=-8*1/24+(-1/8)*24
=-1/3+(-3)
=-10/3
-7×(-3)×(-0.5)+(-12)×(-2.6)
=-(7*3*0.5)+(12*更井计犯继小爱信2.6)
=-10.5+31.2
=20.7
23×(-5)-(-3)÷3/128
=-23*5+3*128/3
=-115+128
=13
标签:计算题,有理数
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