()×4×9 2.5×(1.9+1.9+1.9+1.9) 3.64÷4+4.36×25%
2005× (9)÷()
142857÷117+285714÷117+571428÷117.
递等式计算:
(1)2000﹣72×625÷36 (2)4.8﹣+5.2﹣ (3)222×999+333×334
(4)[5﹣(4.15﹣2)]÷3 (5)+++…+
(6)(289+++)÷(++)
计算下面各题,能简便的尽量简便.
(+﹣)÷ [﹣(﹣)]× 20.07×1994﹣19.93×2007
2.5×0.875+0.25×1.25 999+99+9+ 2.5﹣﹣÷.
脱式计算(能简算的要简算)
(1)()×24
(2)(1+)×(1﹣)×(1+)×(1﹣)×…×(1+)×(1﹣)
(3)2007×
(4)2.5×0.875+0.25×1.25.
计算下面各题,能简算的简算
÷[(+)×] 32×0.25×12.5 8.76﹣2.4++1.24
(+×)×30 9.8×3.72 ×+×﹣.
直接写数对又快
5.7+11.8+4.3= 2﹣+= (+)×24= 0.32﹣0.22=
33×98+66= 10.1×99﹣9.9= 4﹣(+0.5)= :=.
下面各题怎样算简便就怎样算
1.7+5.02+3.98 6÷﹣÷6 ×﹣÷13
3.5×98+35×0.2 3.35×99×2+6.7 ×[÷(﹣)].
试题篮
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