13/4: 7/10+1/4 (27 9/10-17 4/5)*3/5 23/81*3 6/7 7/8: - вопрос №4110264134710142791017453523813677815153219153172 от alina06alina 05.07.2021 13:57

Question

Математика: 13/4: 7/10+1/4 (27 9/10-17 4/5)*3/5 23/81*3 6/7 7/8: 1 5/15*3 2/1 (9 1/5-3 17/25)*2 1/2

alina06alina · Answer

13/4*10/7 +1/4= 130/28 + 1/4= 130/28 + 7/28= 137/28= 4 25/28

(279/10 - 89/5) * 3/5 = (279/10 - 178/10)*3/5=101/10*3/5=303/50=6 3/50

23/81*27/7=23/27*9/7=23/9*3/7=69/63=1 6/63

7/8*15/20*5=105/160*5/1= 105/32= 3 9/32