Răspuns:
Explicație pas cu pas:
2 × ( 3/4) = (2/4) × 3 = 3/2 = 1,5
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1 - (1/5 )× 10 = 1 - 10/5 = 1 - 2 = - 1
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(5/8) × ( 16/35) = (5/35) ×(16/8) = (1/7) × 2 = 2/7
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3 - (1/3 ) × 0,3 =
= 3 - ( 1/3 ) × 3/10 =
= 3 - 1/10 = [ amplific fractie cu 10
= 30/10 - 1/10 =
= 29/10 =
= 0,9(6)
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2 - (2/9) × 1 - 4/5 =
= 2 - 2/9 - 4/ 5 = [ aduc fractiile la acelasi numitor 45
= 90/45 - 10/45 - 36/45 =
= (80-36)/45 =
= 44/45 =
= 0,9(7)
