3/5+3/7+9/7×4/15,(7/9-1/6): 2/9×21/22,7/8+5/8×1/3+2/3,(1/6+3/14): - вопрос №532333235379741579162921227858132316314521114 от Hi1666888888 09.01.2020 03:56

Question

Математика: 3/5+3/7+9/7×4/15,(7/9-1/6): 2/9×21/22,7/8+5/8×1/3+2/3,(1/6+3/14): (5/21-1/14)

Hi1666888888 · Answer

3/5+3/7+9/7*4/15=21/35+15/35+12/35=48/35=1 13/35

(7/9-1/6):2/9*21/22=(28/36-6/36)*9/2*21/22=24/36*9/2*21/22=2/3*9/2*21/22=3*21/22=63/22=2 19/22

7/8+5/8*1/3+2/3=7/8+5/8*3+2/3=21/24+5/24+16/24=42/24=1 18/24=1 3/4

(1/6+3/14):(5/21-1/14)=(7/42+9/42):(14/42-3/42)=16/42:11/42=16/42*42/11=16/11=1 5/11