Question

下面各题怎样简便就怎样算.3－（5/14＋9/14） 2/5＋1/3＋2/33—1/8—7/8 5/6—（1/6－3/4

Answer 1

3-(5/14＋9/14)

=3-1

=2

2/5+1/3+2/3

=2/5+1

=7/5(1又五分之二)

3-1/8-7/8

=3-(1/8+7/8)

=3-1

=2

5/6-(1/6-3/4)

=5/6-1/6+3/4

=2/3+3/4

=8/12+9/12

=17/12(1又十二分之五)

11/14+3/4＋3/14

=(11/14+3/14)+3/4

=1+3/4

=7/4(一又四分之三)

5/6-(5/6-7/12)

=5/6-5/6+7/12

=0+7/12

=7/12