Question

[Dương Mịch]

3/4 + 4/5 

9/10 - 5/6 

7/6 * 4/21 

12/7 : 8/21 

                          lm hộ mk nha

Answer 1

[lyna trang]

3/4+4/5=15/20+16/20=31/20

9/10-5/6=27/30-25/30=2/30=1/15

7/6×4/21=28/126=14/63

12/7÷8/21=12/7×21/8=252/56=63/14

K mk nha bn

Answer 2

[khanh cuong]

3/4 + 4/5 = 31/20

9/10 - 5/6 = 1/15

7/6 * 4/21 = 28/126

12/7 : 8/21 = 252/56

k mk  nha