Pelajaran kelas 4 sd

1. 7 10/11 + 3 4/5
= 87/11 + 19/5
= 435/55 + 209/55
= 644/55
2. 12 - 5 4/19
= 12/1 - 99/19
= 228/19 - 99/19
= 129/19
3. 5 8/9 x 8 1/4
= 53/9 x 33/4
= 1.749/36
= 583/12
4. 7 12/13 : 11 3/4
= 103/13 : 47/4
= 103/13 x 4/47
= 412/611