Bonsoir,
b. - 2/3 + 7/8 - 5/6
= (- 2 x 8) / (3 x 8) + (7 x 3) / (7 x 3) - (5 x 4) / (6 x 4)
= - 16/24 + 21/24 - 20/24
= - 36/24 + 21/24
= - 15/24
= (3 x - 5) / (3 x 8)
= - 5/8
c. - 2/10 + 7/25
= (- 2 x 5) / (10 x 5) + (7 x 2) / (25 x 2)
= - 10/50 + 14/50
= 4/50
= (2 x 2) / (2 x 25)
= 2/25.
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Bonsoir,
b. - 2/3 + 7/8 - 5/6
= (- 2 x 8) / (3 x 8) + (7 x 3) / (7 x 3) - (5 x 4) / (6 x 4)
= - 16/24 + 21/24 - 20/24
= - 36/24 + 21/24
= - 15/24
= (3 x - 5) / (3 x 8)
= - 5/8
c. - 2/10 + 7/25
= (- 2 x 5) / (10 x 5) + (7 x 2) / (25 x 2)
= - 10/50 + 14/50
= 4/50
= (2 x 2) / (2 x 25)
= 2/25.