Question

请问32.81×99+32.81×10的简便运算是怎么做的呢？

Answer 1

32.81×99+32.81×10
＝32.81×（99+10）
＝32.81×109
＝32.81×100+32.81×10-32.81
＝3281+328.1-32.81
＝3609.1-32.81
＝3276.29

Answer 2

原式=32.81（99+10）
=32.81（100+10-1）
=3281+328.1-32.81
=3576.29

Answer 3

32.81*99+32.81*10=32.81*（99+10+1-1）=32.81*100+32.81*10-32.81=3281+328.1-32.81=3609.1-32.81=3576.29

Answer 4

32.81×99+32.81×10
=32.81×（100－1）+32.81×10
=32.81×100－32.81+328.1
=3281+328.1－32.81
=3576.29

Answer 5

32.81x99+32.81Ⅹ10
=32.81Ⅹ99+32.81Ⅹ1+328.1Ⅹ9
=32.81X（99+1）+32.81x9
=32.81Ⅹ100+32.81x10-32.81Ⅹ1
=3281+328.1-32.81
=3576.29