Номер 1418.
1))] (3 1/5+ 9,65) : (2,71+ 2,29) +4,23=6,8
1)) 3 1/5+ 9,65= 3 (1•2)/(5•2) +9,65= 3 2/10+ 9,65= 3,2+ 9,65= 12,85
2)) 2,71+ 2,29= 5
3)) 12,85: 5= 2,57
4)) 2,57+ 4,23= 6,8
2))] 2 3/4 :11 + 22 1/50 :6 - 53,77: 19= 1,09
1)) 2 3/4 :11= (4•2+3)/4 • 1/11= 11/4• 1/11= 1/4• 1/1= 1/4= 1:4= 0,25
2)) 22 1/50 :6= (50• 22+1)/50 •1/6= 1101/50 •1/6 = 367/50• 1/2= 367/100= 3 67/100= 3,67
3)) 53,77 :19= 2,83
4)) 0,25+ 3,67 - 2,83= 3,92- 2,83= 1,09.