tolong bantu kerjakan ya? pakai cara agar saya paham. terimakasih sebelumnya
(yang di lingkari saja)
(yang di lingkari saja)
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Penjelasan dengan langkah-langkah:
disamakam dulu penyebutnya
a. penyebutnya dijadikan 18
2/3 + (5/6 + 7/9)
= 12/18 + (15/18 + 14/18)
= 12/18 + 29/18
= 41/18
(2/3 + 5/6) + 7/9
= (12/18 + 15/18) + 14/18
= 27/18 + 14/18
= 41/18
sama
b. 2/3 - (5/6 - 7/9)
= 12/18 - (15/18 - 14/18)
= 12/18 - 1/18
= 11/18
(2/3 - 5/6) - 7/9
= (12/18 - 15/18) - 14/18
= -3/18 - 14/18
= -17/18