1) 1,5*10+2,08*45 = 15+93,6=108,6; 2)12,08*100-75,6*11=1208-831,6=376,4; 3)46,131*10+91,05=461,31+91,05=552,36.
1)х+287=486 2)х:11=22033 3)403-х=265 4)725:х=29 5)х-288=513
х=486-287 х=22033*11 х=403-265 х=725:29 х=513+288
х=199 х=242363 х=138 х=25 х=801
6)47*х=4700
х=4700:47
х=100
5/7+7/9 = 45/63 + 49/63 = 94/63 = 1 31/63 =
29/60-7/30 = 29/60 - 14/60 = 15/60 = 1/4
5/42+10/63 = 15/126 + 20/126 = 35/126=5/18
(20 1/5-11 2/15)- 6 1/3=9 1/15-6 1/3=8 16/15-6 1/3=2 11/15