Решите по действиям: г) (-3 1/3 + 2 5/6) * (-8 - вопрос №7299464313256859729113 от sara133 05.02.2020 12:49

Question

Математика: Решите по действиям: г) (-3 1/3 + 2 5/6) * (-8 5/9 + 7 2/9)= д) 1 1/3 * (-3/ 1/7) * 1 2/5=

sara133 · Answer

1.1) -3 1/3+2 5/6 = 2 5/6-3 2/6 = 2 5/6-2 8/6 = -3/6 = -1/2
2) -8 5/9+7 2/9 = -1 3/9 = -1 1/3
3) -1/2*(-1 1/3) = 1/2*4/3 = 2/3

2.1) 1 1/3*(-3/4) = -4/3*3/4 = -1
2) -2 1/7*1 2/5 = -9/7*7/5 = -9/5 = -1 4/5
3) -1-(-1 4/5) = -1+1 4/5 = 4/5