tolong jawab 2 => 10

2. -
3.
20 = 2,2,5
34 = 2,1 7
4. -
5.
73 + [-840] ÷ 24
= -18 + 73
= 55
6. -
7. 250 = 2,5,5,5
8.
857 + 95 ÷ 5 - 78
= 857 + 19 - 78
= 798
9.
421 - 45 × 5
= 421 - 225
= 196
10.
75 = 3,5,5
90 = 2,3,3,5
120 = 2,2,3,5
FPB = 2×3×5 = 30