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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.

题目详情
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.
▼优质解答
答案和解析
(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,
故答案为:798,2.25,0.5,14,0.625.