Question

计算下面各题,能简算的简算（7/5+49）*1/49 45*16/9+20/9/1/4515.6-2又2/7-4又5/7

Answer 1

（7/5+49）*1/49

=7/5*1/49+49*1/49

=1/35+1

=1又1/35

45*16/9+20/9/1/45

=45*16/9+20/9*45

=45*(16/9+20/9)

=45*4

=180

15.6-2又2/7-4又5/7

=15.6-(2又2/7+4又5/7)

=15.6-7

=8.6

7/12+（3/4-1/3）/1/36

=7/12+（3/4-1/3）*36

=7/12+(3/4*36-1/3*36)

=7/12+(27-12)

=25又7/12