24 4/5-19,5÷7 2/9 решить по действиям.

24 4/5-19,5÷7 2/9 = 22.11) 19 5/ 10 ÷ 7 2/ 9 = 19 1·5/ 2·5 ÷ 7 2/ 9 = 19 1 /2 ÷ 7 2/ 9 = 1 + 19·2 /2 ÷ 2 + 7·9/ 9 = 39 /2 ÷ 65/ 9 = 39/ 2 × 9 /65 = 39·9/ 2·65 = 351/ 130 = 27·13 /10·13 = 27/ 10 = 7 + 2·10/ 10 = 2 7 /10 ;2) 24 4 /5 - 2 7/ 10 = 22 + 4/ 5 - 7 /10 = 22 - 4·2/ 5·2 - 7·1 /10·1 = 22 + 8 /10 - 7 /10 = 22 + 8 - 7/ 10 = 22 1/ 10 = 22.1