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1. 7 7\10 - 5\6 - 2\4
=(10 x 7+7/10) - 5/6 - 2/4
= 77/10 - 5/6 - 2/4
= 462/60 - 50/60 - 30/60
= 382/60 dalam pecahan biasa
= 6 22/60
= 6 11/30 dalam pecahan campuran
= 6,36 dalam pecahan desimal
2. 5 7\9 - 1\4 - 2 1\12
= (9x5+7/9) - 1/4 -( 12 x 2+1/12)
= 52/9 - 1/4 - 25/12
= 416/72 - 18/72 - 150/72
= 248/72 disederhanakan
= 31/9
= 3 32/72 disederhanakan
= 3 4/9 dalam pecahan campuran
= 3,44
3. 12 13\15 - 3\4 - 4\5
= (15x12+13/15) - 3/4 - 4/5
= 193/15 - 3/4 - 4/5
= 772/60 - 45/60 - 48/60
= 679/60 dalam pecahan biasa
= 11 19/60 dalam pecahan campuran
= 11,31 dalam pecahan desimal
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