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×(
+
﹣
)





)×0.25 [3.6﹣(1.6+
)﹣
]×
×[
﹣(
﹣0.25)] (1+
)×(1+
)×(1+
)×(1+
)×(1+
)

.
)÷
19﹣19×
﹣0.8+
35÷
.
+2.5% 9.6﹣11÷7+
×4
5.125×
+2.875÷4.
×
2.25×1.8+1.25×0.18.
+6.4+
(3)4.9÷〔(5.5﹣0.6)×0.1〕
+
)÷
+
﹣
)].
.
+
﹣
(2)3.2﹣0.85﹣1
(3)3.2×
﹣
÷2
+
)÷
×6%
×〔(
+
)÷
〕 45×
+
+2.4÷
)
+60% 5.72﹣1.84﹣1.16 7
×6
+2
×6
×2.4)]÷
.
.
+9.2×4
+9
(3.75+4.1+2.35)×9.8.
+
﹣
)×24 1634﹣248÷8×20
×[
×(
﹣
)].
×[1÷(
+
)] 42×0.99
+
)×12.
[(
)
]
.
×
+
×[
÷(
﹣
)].
=
=
= 0.1÷0.01= 3.47﹣(2.5+0.47)=
= 1÷
=
= 5.58÷0.78≈
=
=
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