Jawapan

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2016-01-28T23:52:40+08:00
Samakan penyebut 4/5 dan 1/4 mengikut kaedah darab silang

4x4/5x4 dan 1x5/4x5 =
= 16/20 dan 5/20
= 16/20 - 5/20
= 11/20
2 5 2
2016-01-29T00:22:58+08:00
(4/5)-(1/4)
=(4×4/5×4)-(1×5/4×5)
=16/20-5/20
=11/20
1 5 1