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

Answer 2

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

Answer 3

32.81×99+32.81×10
=32.81x(99+1)+32.81x(10-1）
=32.81x100+32.81x10-32.81
=3281+328.1-32.81
=3609.1-32.81
=3576.29

Answer 4

32.81×99+32.81×10
=32.81×(100－1)+328.1
=32.81×100－32.81+328.1
=3281－32.81+328.1
=3248.19+328.1
=3576.29

Answer 5

因为99=100-1，所以原式等于32.81×（100-1）+32.81×10=32.81×100-32.81+328.1=3576.29