Explicație pas cu pas:
f) - 3/8 × (-16/9) = 48/ 72 = 6/ 9 = 2/3
h) 3/6 × (-9/5) = - 27/30 = - 9/10
i) - ( 7× 10)/27 × 3/7 × (-4)/5 = 70/27 × 3/7 × 4/5 = 10/9 × 4/5 = 20/9
j) - (3 × 10) / (17× 7) × ( 17 ×28) / ( 3× 5) = - (3× 10 × 17 ×28)/ ( 17×7 × 3 ×5) = - (2× 4) / 7 = - 8/7
