Ответ:

Пошаговое объяснение:

№ 16

а) -5 * 3 1/3 = -5 * 10/3 = -50/3 = -16 2/3

б) 2/9 * (-1 2/7) = 2/9 * (-9/7) = 2/1 * (-1/7) = -2/7

№ 17

а)

1) 5,6 * (-3/7) = 56/10 * (-3/7) = 8/10 * (-3/1) = -24/10 = -2 4/10 = -2 2/5

2) -5 * 3 1/3 = -5 * 10/3 = -50/3 = -16 2/3

3) -2 2/5 - (-16 2/3) = -2 2/5 + 16 2/3 = -2 6/15 + 16 10/15 = 14 4/15

б)

1) -0,75 * 2/9 = -3/4 * 2/9 = -6/36 = -1/6

2) 7 1/4 * (-0,3) = 29/4 * (-3/10) = -87/40 = -2 7/40

3) -1/6 - (-2 7/40) = -1/6 + 2 7/40 = -20/120 + 2 21/120 = 2 1/120