Jawapan

2016-01-29T13:11:32+08:00
13×8.617km÷7
=112.021km÷7
=16.003km
2016-01-29T13:22:17+08:00
8.617 × 13 = 112.021
112.021 ÷ 7 = 16.003 
#harapmembantu^_^