Question

помогите решить 9-47, 5-1218, 2-2550, 3-4460, ( 4-2 58)+3 78, (6-3 1520)+2 1020, (3 1525+2 1025)-(2 816+ 1 216), 5- 48+ 128

Answer 1

1.= 63-4/ 7 =59/7;
2.=5 - 2/3 = 13/3;
3.=3 - 11/15 =34/15;
4.=11/4 + 21/8 = 43/8;
5.=15/4 + 1 = 19/4;
6.=13/5 -9/8 =59/40;
7.=10-1+3/ 2 = 12/2 = 6;