Jawapan

2016-09-06T12:35:41+08:00
80 ÷ 4 × 5 = 5 x 2 x c
= 20 x 5 = 10 x c
= 100 = 10c

c = 100 ÷ 10
= 10
2016-09-06T17:25:16+08:00
80 bahagi 4 dapat 20.
20 kali 5 dapat 100.
5 kali 2 dapat 10.
100 bahagi 10 dapat 10.
Jawapannya 10.