Question

七分之一乘以102.31+四十又七分之六怎么简便运算

• 你的回答被采纳后将获得：
• 系统奖励15（财富值+成长值）+难题奖励30（财富值+成长值）

Answer 1

1/7x102.31+40+6/7
=1/7x102.31+40+1-1/7
=1/7x(102.31-1)+41
=1/7x(98+3.31)+41
=14+331/700+41
=55+331/100
=5831/100

Answer 2

=1/7×102.31+40+（1-1/7）

=1/7×102.31+40+1-1/7×1

=1/7×102.31+41-1/7×1

=1/7×（102.31－1）+41

=1/7×101.31+41

1/7×101×31÷100+41

=3131/700+41

=45又331/700