Выполните умножение: 1) 5/6 × 1 6/5=? 2) 3 1/9 - вопрос №495618115616523193431015101749 от pavlushkaaa 20.04.2021 15:22

Question

Математика: Выполните умножение: 1) 5/6 × 1 6/5=? 2) 3 1/9 × 3/4=? 3) 10 1/5 × 10/17=? 4) 9 1/7 × 3/4=? 5) 3/11 × 5 1/2=? дарю 15 !

pavlushkaaa · Answer

1) 5/6 × 1 6/5 = (5×11) / ( 6×5) = 11/6 = 1 5/6
2) 3 1/9 ×3/4 = (28×3 )/(9×4) = (7×1)/ (3×1)= 7/3 = 2 1/3
3) 10 1/5 × 10/7 = (51×10) / (5×7)= 102/7 = 14 4/7
4) 9 1/7 ×3/4 = (64×3) / (7×4)= (16×3) / (7×1)= 48/7 = 6 6/7
5) 3/11 × 5 1/2 = (3×11)/ (11×2)= 3/2 = 1 1/2