列式计算,能简算的简算(1)2010-4848÷9.6×2.4?????????????(2)(-×)÷(3)×[-(-)](4)(++)×12+(5)已知18+[×

发布时间:2020-08-04 14:38:47

列式计算,能简算的简算
(1)2010-4848÷9.6×2.4?????????????
(2)(-×)÷
(3)×[-(-)]
(4)(++)×12+
(5)已知18+[×1.25+(+________×12]÷0.125=86,求出横线上应填的数.

网友回答

解:(1)2010-4848÷9.6×2.4,
=2010-505×2.4,
=2010-1212,
=798;

(2)(-×)÷,
=(),
=,
=2.25;

(3)×[-(-)],
=×[-],
=×,
=0.5;

(4)(++)×12+,
=×12×12×12,
=8+5+(),
=13+1,
=14;

(5)设要求的数是x,
18+[×1.25+(+x×12)]÷0.125=86,
??? 18+[×1.25++12x]÷0.125=86,
????????????? 18+[1+12x]÷0.125=86,
?????????????????????? 18+8+96x=86,
????????????????????? 26+96x-26=86-26,
??????????????????????? 96x÷96=60÷96,
????????????????????????????? x=0.625.
答:要求的数是0.625,
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