3 运动定律与简便运算
计算下面各题(能简算的要简算)
(1)
×101﹣
(2)2.5×2.72+0.24×2.5+1.04×2.5 (3)200﹣120÷1.6×1.2.
脱式计算.(能简算的要写出简算过程)
14.5﹣(8.3﹣5.5) 34×
+
56×(
﹣
)÷
3.8﹣1.9+7.2﹣8.1 (
+
﹣
)×24
÷9+
×
.
脱式计算,能简算的要简算.
①1÷[
×(1﹣
)] ②3.8×99+3.8 ③2700×(506﹣499)÷900
④
÷[
×(
﹣
)] ⑤33.02﹣(148.4﹣90.85)÷2.5 ⑥
÷7+
×
.
直接写出得数.
(
﹣
)×6= 1
×0÷1
= 12×5÷12×5= 0.75×99+
=
5%×24÷5%= 82+8×2= 4÷9×
= 0.375﹣
+0.1=
用递等式计算,能简便的要求写出简算过程.
①36×
﹣15×25%﹣0.25 ②15.8﹣
+14.2﹣
③(1+
)÷(1﹣
) ④2.5×3.2×12.5.





+
) (2.76+3.06÷
)×2.2 2.5×4.3+2.5×4.7+2.5 (
﹣25%+
)÷
×
.
+6.39×
0.25×32×0.15 8×
+8×
+8 3
﹣2
+5
﹣1
.
+2.2×0.25 5.02﹣1.37﹣2.63
×40﹣
÷
.
+1.75×
.
+
) 8×(36×125)
﹣
×
+
〔1﹣(
﹣
)〕÷
.
×(x+50%)=16
0.4÷
+
×
99×
+
×0.25+
÷4×
×0.375﹣
÷
﹣
÷
﹣
×[
÷(
)].
+
)×24
+(
﹣
④
÷[(
﹣
÷6+
×
(
+
)×42 (
﹣
)÷
+
×
+
÷
3.57×[
÷(2.6﹣
)].
÷6 (2)24×(
) (3)3﹣1÷(
)
(5)
(6)
.
÷
×
÷
÷[(
﹣
)×3]
﹣
÷3+
﹣
)
×
+
÷
÷[(
+
)×
].
+(1﹣
)]
④
+〔
÷(
+
)〕
25×2.5×32
×(
+
)+0.8
+80%﹣
.
×(0.6﹣0.25)
×
+
÷
8×6.5﹣148×0.65
×(
﹣
)+15%
×[
÷(
×
)]
+
×
3
+
﹣
+
1.25÷0.5+
×2.15﹣
×8.85 24×(
﹣
) 67×
.
﹣
)+(
﹣
)]÷
+
)×13
﹣
)×
]÷
×
+
÷
+
)÷(
÷4﹣
)
+2.625) (
÷[
﹣(
+
)].
÷[(
)×
×39+61÷25 60×(
) 9.6÷3.2+5.2×0.4.
+
+
25×32×1.25 43×99+43
+
)×24
÷(
﹣
)×
.
÷50%= 0.8×125%= 5÷
×
=
)÷12=
×11+
×10﹣
[1﹣(
+
)]÷
(
+
﹣
)×24 (19﹣
)÷19
×
+
÷4 2﹣
÷
﹣
χ÷
χ﹣
χ=12.
②38×
③12.4×7.8+1.24×22
62.5% ⑤(
)÷
.
×
÷(
)
×
粤公网安备 44130202000953号