Question

1+(-1/12)-(-2/15)+(-1/12)+(-7/15)写出计算过程 30分以内加分!

Answer 1

1+(-1/12)-(-2/15)+(-1/12)+(-7/15)

=1-1/12+2/15-1/12-7/15

=1-1/6-5/15

=1-3/6

=1/2