3 运动定律与简便运算
计算:
①+﹣= ②3.2﹣0.85﹣1= ③3.2×﹣÷2= ④1.725×4×0.5=
⑤(+)÷= ⑥1.8×0.72+1.28×1.8= ⑦2÷(﹣)= ⑧57.6÷[(1.25+25%)×0.32]=.
脱式计算,能简便的用简便方法计算
(1)0.4×580﹣195÷6.5 (2)7.6÷1.25÷8 (3)(+)÷﹣
(4)÷﹣× (5)18.64﹣(+4.64) (6)÷[8×(﹣)].
递等式计算(能简便的要简便).
(3618÷18﹣145)×20 4.2÷×﹣0.5 8.375+﹣+
×37﹣19÷ ÷[2﹣(+)] (2﹣×)÷(+)
用递等式计算(能简便计算的要写出简算过程).
6.5×8+8×3.5 1210÷[56×(﹣)] 1÷2.5+2.5×0.4 168.1÷(4.3×2﹣)
(1)0.125×0.32×5=
(2)=
(3)=
(4)35000÷28×8=
(5)222×555=
(6)=
(7)0.125×0.25×0.5×64=
(8)=
直接写得数
1÷0.01= 100×0.4%= ÷÷6= 12÷(+)=
÷10%= 8﹣8÷9= 6﹣+= (+﹣)×30=
×= 1÷0.1×1÷0.1= ÷×6= ﹣×=
计算下面各题(能简算的要简算).
360÷15﹣2.5×14 ×〔÷(﹣)〕 25×1.25×32
5.25﹣(+4.25) ×2012 3.5×98+0.2×35.
脱式计算(能简算要简算)
(1)(66﹣32×1.2)÷0.25 (2)10×+17×75%﹣7×0.75
(3)0.25×(5(3﹣2.5×)) (4)9.99×22.2+33.3×3.34.
计算下题,能简便的要简便计算,并写出必要的过程.
①6.6﹣48×÷4.8 ②×0.6+÷ ③63×+36×+75%
④[3.6﹣(+1÷3)]× ⑤0.008×0.000125+0.0125÷0.04 ⑥1﹣﹣﹣﹣.
直接写得数.
698+560= 1200﹣909= 1.3+0.41= 500÷5÷20=
2.7﹣1.58= 2.5×0.4= 1.4÷3.5= 3.65+0.36×0=
452.4÷48.9≈ 201.2×39≈ = =
1.65+0.8= 3.6﹣0.36= 1÷= 8.4+99×8.4=
= = = =
用你最喜欢的方法计算.
1.25×0.25×32
(0.25+)÷(﹣)
×0.25+×
[(8.7﹣7.5)÷0.2]×0.15
3.75×58.3÷58.3×6.54÷3.75÷65.4
56×(+﹣)