(3/5-19/25)×4 11/16 -(1÷1,5)×(-3 3/8) - вопрос №709124035192541116115338 от abuovalmaz69 25.07.2020 20:31

Question

Математика: (3/5-19/25)×4 11/16 -(1÷1,5)×(-3 3/8)

abuovalmaz69 · Answer

(3/5 - 19/25) * 4 11/16 - (1 : 1,5) * (-3 3/8) = 1 целая 1/2

1) 3/5 - 19/25 = 15/25 - 19/25 = -4/25
2) -4/25 * 4 11/16 = -4/25 * 75/16 = -(1*3)/(1*4) = -3/4
3) 1 : 1,5 = 10/15 = 2/3
4) 2/3 * (-3 3/8) = 2/3 * (-27/8) = -(1*9)/(1*4) = -9/4 = -2 1/4
5) -3/4 - (-2 1/4) = -3/4 + 2 1/4 = 2 1/4 - 3/4 = 1 5/4 - 3/4 = 1 2/4 = 1 1/2