早教吧作业答案频道 -->其他-->
脱式计算(能简算的要简算)(1)4×0.8×2.5×12.5(2)45×(215+29)-45(3)1.02×404(4)6.5×18.3+0.17×65.
题目详情
脱式计算(能简算的要简算)
(1)4×0.8×2.5×12.5
(2)45×(
+
)-
(3)1.02×404
(4)6.5×18.3+0.17×65.
(1)4×0.8×2.5×12.5
(2)45×(
2 |
15 |
2 |
9 |
4 |
5 |
(3)1.02×404
(4)6.5×18.3+0.17×65.
▼优质解答
答案和解析
(1)4×0.8×2.5×12.5
=(4×2.5)×(0.8×12.5)
=10×10
=100;
(2)45×(
+
)-
=45×
+45×
-
=6+10-
=15
;
(3)1.02×404
=(1+0.02)×404
=1×404+0.02×404
=404+8.08
=412.08;
(4)6.5×18.3+0.17×65
=65×1.83+0.17×65
=65×(1.83+0.17)
=65×2
=130.
=(4×2.5)×(0.8×12.5)
=10×10
=100;
(2)45×(
2 |
15 |
2 |
9 |
4 |
5 |
=45×
2 |
15 |
2 |
9 |
4 |
5 |
=6+10-
4 |
5 |
=15
1 |
5 |
(3)1.02×404
=(1+0.02)×404
=1×404+0.02×404
=404+8.08
=412.08;
(4)6.5×18.3+0.17×65
=65×1.83+0.17×65
=65×(1.83+0.17)
=65×2
=130.
看了 脱式计算(能简算的要简算)(...的网友还看了以下:
(2012•师宗县模拟)用递等式计算(能简算的请简算).①646+136÷17×25②44×(51 2020-04-07 …
用简便方法计算.①5.38-(1.5+2.38)②5.用简便方法计算.①5.38-(1.5+2.3 2020-04-07 …
脱式计算(能简算的要简算).13.8+9.6-12.513.26-5.12-4.885.18+5. 2020-04-07 …
简算0.16×9.85+264×0.0985+72×0.985=?简算4800÷12.5÷2.5÷ 2020-06-11 …
脱式计算(能简算的要简算).72.8÷5.6+1.4958.1-29.7÷330.94-5.09- 2020-07-17 …
计算下面各题(能简算的要简算).①4×0.8×2.5×12.5②215÷[1-(15+13)]③( 2020-07-19 …
脱式计算,能简算得要简算.5.46÷3.9+4.5×2.34.23×9.9+0.4232.58-( 2020-07-19 …
脱式计算,能简算的要简算686X1013.7X99+脱式计算,能简算的要简算686X1013.7X 2020-07-19 …
用递等式计算(能简算的要简算).415-234+5129999×36+6666×961225-22 2020-07-24 …
(2012•龙泉驿区)怎样简便就怎样计算,能简算的写清楚简算过程要计分.5+(20÷1.6)×6.8 2020-12-26 …