3 运动定律与简便运算
下面各题怎样简便就怎样算(求未知数x)
9
÷[3.2×(1﹣
)+3
]
:2x=1
:2
29×
+
×114
999
+99
+9
0.625×7.3×1
﹣1
+3.7﹣2
1
+2
+3
+4
+5
+6
(
﹣
+
)÷
.
下面各题怎样简便就怎样算
14.4÷0.125÷8 (
+
)×24×
2.34×56﹣23.4×5.6
1.5×
+0.8×5.5+2×
1005÷[42×(
﹣
)]
÷[1﹣(
+
)].
计算:(能简便的要简便计算)
①2526﹣36×42÷27
②17.09﹣3.63﹣6.37
③1
×(
﹣
)
④5.6×3
﹣
×(9﹣2.5)
⑤0.25÷(
+0.2)﹣
.
脱式计算.(能简便的要简便)
(1)2005﹣395+605 (2)16×125×21 (3)
÷(1﹣
)
(4)
﹣8×
(5)(
﹣
)÷
(6)4.8×96+4.8÷
.
计算下面各题(能简便计算的要用简便方法计算)
456﹣199 0.25×5.7×4 252÷24﹣0.4×6
(3.8﹣1.8÷2)×
(8+
)÷4 4.4﹣
+1.6﹣
.
脱式计算,能简算的要简算.
①85×54÷18+745 ②3.4÷[(1.25+0.45)×2] ③1080+270÷18﹣864
④7.54+
+2.46+
⑤(2.4﹣
)÷0.625+
⑥98.9×99+98.9.
简便计算:
560﹣476÷17×5
+5.13+
+0.87 (20.2×0.4+7.88)÷4.2
÷[(
)×
] 7.6×
+7.6×0.4 (0.75+
)÷
×
.
计算下列各题,能用简便方法的要用简便方法计算.
①486﹣23×16
②2.5×3.2×1.25
③3.5×2.6﹣4.5
④7﹣
÷2﹣
⑤[1﹣(
+
)]÷
⑥24×(
+
﹣
)
计算下面各题.
(1)1475﹣16×25 (2)
÷
×
(3)2.87+5.6﹣0.87+4.4
(4)44﹣24×
(5)4.2÷7÷0.6 (6)
﹣(
+
)÷
.
﹣
﹣7.3)÷
÷[
﹣(
+
)].
+0.2)﹣
7÷〔
×(
+
)〕 5.7×0.25+6.8×25%﹣8.5×
; 72.5+12.5+12.5÷
; [(
+1
)×
﹣0.25]÷
;
(3)
(5)
(6)
.


.
95.6×27﹣17×95
,
.
(6.9﹣3.15)÷0.3×0.8.
÷
+
×
[
﹣(
﹣
)]÷
×
+
×
×[
﹣(
﹣
)].
=
= 0.25×1.25×32=
=
=
=
=
③2.75+3
⑤12×(
+
﹣
) ⑥[(4﹣1
)÷1.2+1
.
+1.29) 2700﹣780÷26×34 1.25×32×2.5
×45﹣
.
×
③(
﹣
)÷
④4.32+
+0.68+
.
+
﹣
)
×
+
÷
[1﹣(
+
)]×24.
.
.
÷
+
×
③5﹣5×
+
+
)×8+
⑥
×[1÷(
﹣
)].
﹣1.25+4.4﹣
4.5×6.6+3.4×4.5.
.
+4.8﹣
÷
+
×
)×24] (
+
(
+
)÷
+
.


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