脱式计算:(第(4)题要巧解)
[(8﹣4.625)÷(2.4+1)]×50% (0.9+1)÷[(4﹣3)×0.8
81×[(4+0.005×700)÷1] (1﹣12.5%×8)÷(1+)+.
计算.(能用简便方法的要用简便方法)
(1)7.9×4.9+5.1×7.9 (2)18×(+)÷45
(3)(++)×48 (4)1﹣(+)÷.
19.98×37﹣199.8×1.9+1998×0.82 888+32×0.125×0.25
7.8÷[32×(1﹣)+3.6] +++…+.
下面各题,怎样简便就怎样算.
19.98×37﹣199.8×1.9+1998×0.82 9999×7+1111×37
[﹣(﹣)]× (70+)×.
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.
(1)2.25×3.14×4÷3.14 (2)(﹣)×17×5
(3)x:=51:17 (4)×7+4x=850%
(5)1:0.4=1.35:x.
试题篮
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