Question

29.5×2.9+52.5×0.29的简便运算怎么算？

Answer 1

观察题目，可以看出2.9和0.29的关系，2.9=10*0.29 ，原式等于0.29*10*29.5+0.29*52.5=0.29*（295+52.5）=0.29*347.5=100.775

Answer 2

将后面52.5×0.29换成5.25×2.9，然后提取2.9，算出29.5+5.25等于34.75，再用34.75×2.9得到100.775。

Answer 3

简便运算方法：
29.5x2.9+52.5x0.29
=29.5x10x0.29x10+52.5x0.29
=0.29x[（29.5x10）+52.5]
=0.29x（295+52.5）
=0.29x347.5
=100.775

Answer 4

29.5×2.9+52.5×0.29
=29.5×2.9+5.25×2.9
=2.9×（29.5+5.25）
=2.9×34.75
=（3－0.1）×34.75
=3×34.75－0.1×34.75
=104.25－3.475
=100.775

Answer 5

答：由原式得：29.5x2.9十5.25x10xo.29
＝29.5×2.9十5.25×2.9
＝2.9x（29.5十5.25）
＝2.9×34.75
＝1oo.775。