3 运动定律与简便运算
简便计算下面各题.
44×0.25 (
+
)×15×17 85.57﹣(5.57﹣3.8)
99999×77778+33333×66666 27×
+136×
+180×
.
计算,能简便的要简算.
(1)
(2)
(3)2001×20022002﹣2002×20012001 (4)2000﹣1+9×111×999
(5)2008﹣1+2﹣3+4﹣…+2006﹣2007.
计算,能简算的要简算
2317﹣1217﹣517 16.8÷(4.3×2﹣0.2) 36÷[(56﹣23;)×3]
7.5×46.7+52.3×7.5+7.5 6×14+13÷4﹣19×0.25.
用简便方法计算(要写出主要简算过程).
1.7+5
+3.98; 17.625﹣(4.4+7
) 3.35×6.4×2+6.7×3.6
0.25×48×1.25 3.34﹣5÷17﹣
×4
﹣(
﹣
)×9.
计算下列各题,能简算的要简算.
3.75×
+
×1.25 0.25×1.25×32
+
+1
+8
(
+
+
)÷
5.36﹣1.86﹣3.14 6.8×8+3.5×8﹣44.





﹣
)]×
99.9×98+(0.8﹣
)×999.
.
.
125×3.2×2.5 0.9+99×0.9.
×3.5+5.5×80%+0.8 ②(
×19﹣
)×
÷[
×(
﹣
)] ④2.35÷[4.75﹣4.5×(0.2+
)].
×2.375+95
×1.6.
×101﹣
﹣
)×(
+
)
(2)
×102.31+
×102.31
+
﹣
) (4)
÷〔
×(
+
)〕
+
)×15×17
+2004÷
.
) (4)
.
= (3)12.5×5×0.16= (4)
÷7=
+3
+5
+7
+9
2008×20072008﹣2006×20082007.
+
×6
﹣2
﹣5
(4)69×1
.
.
.
.
÷
﹣
4.9×6.4+14×0.36﹣6.4×3.5.
+
+
++
+
⑤(
﹣
)×12 ⑥1000+999×999.
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