3 运动定律与简便运算
下面各题,怎样算简便就怎样算.
3.4×1.25+1.25×4.6 1.8÷1.5﹣0.4×0.7 25×3.2×12.5
(
+
)×(
﹣
) 35÷[(
﹣
)×3].
计算下面各题,能简算的要简算
6.75﹣(4.2+1.75) 3.5×(20.6﹣16.8÷4.8) [
﹣(
﹣
)]÷
48.38﹣21.63﹣8.37 (
﹣
+
)×12
.
脱式计算,能用简便方法要用简算.
2001×
349×101﹣349 37×9.25+37×
306×35﹣4080÷24 9
﹣6
﹣1
6.8×16.8+19.3×3.2.
×16﹣8÷
1÷[
×(
﹣
)].
﹣
)×8
﹣
)÷
+22÷51.
×
.
×38.3+2.7×0.8
×
﹣4.6×
9.5×3.8+
×(19×
) 14×72+42×76
.
×5.25+3.75÷8+
.
×
675×1.4+
×
﹣6.75
×
+125×0.26+1.25×32.
4.8×3.9+6.1×4
12×(
+
﹣
) (
+
)÷
+
×
÷
1110÷〔56×
〕
÷
2.5×(1.9+1.9+1.9+1.9) 5.4÷18+12.
×4.4+5.6×□
×
+
÷
+
÷
﹣
×
.
×3+
×5+
+
+
+
)×2002 8.5×
+0.75×5+6.5÷1
+
+
+
+
.
﹣2.45﹣1.55 ②87.5+12.5÷8.
②
.
÷9 (2)4
﹣(2.8÷
﹣1.625 (4)2
﹣1.375+7.25﹣6
.
+6.4×
+
﹣
)〕 ④9999×2222+3333×3334.
+
+
)×24 19.9+19.9×99 3
÷
+3
0.625×5.8+
×3.2+
86×
÷
×
1
﹣(
﹣
)
+
)÷
÷
+
÷
+37×
×
+
×
4.2×102﹣8.4
÷(1﹣
)×
36×
.
+51×
0.25×(1.6+1.6+1.6+1.6)
÷
+
×
0.125×32×2.5.
+6
÷8
10.8﹣1.5﹣8.5 199+456.
+
﹣
+
+
+
+
﹣
﹣
﹣
﹣
﹣
﹣
﹣
.
+2.2×25% ②102×59 ③57.5﹣14.25﹣15
④
×102.31+40
×102.31.
+
﹣
)÷
(2)
÷
+
×
+
﹣
χ=
.
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