0,8+3/7; 3 1/3-2,5; 4,9+1 1/9; 26 1/11-5,7; 40,8+15 - вопрос №527002208373132549119261115740815231851395 от tans83lsk 16.05.2020 21:35

Question

Математика: 0,8+3/7; 3 1/3-2,5; 4,9+1 1/9; 26 1/11-5,7; 40,8+15 2/3; 18 5/13-9,5.

tans83lsk · Answer

0,8+3/7=8/10+3/7=56/70+30/70=86/70=1 16/70=1 8/35
3 1/3-2,5=3 1/3-2 1/2=3 2/6-2 3/6=5/6
4,9+1 1/9=4 9/10+1 1/9=4 81/90+1 10/90=5 91/90=6 1/90
26 1/11-5,7=26 1/11-5 7/10=26 10/110-5 77/110=20 43/110
40,8+15 2/3=40 8/10+15 2/3=40 24/30+15 20/30=56 14/30=56 7/15
18 5/13-9,5=18 5/13-9 1/2=18 10/26-9 13/26=8 23/26