Tg15=sin15/cos15=2sin15cos15/2cos^15=sin 30/(cos30+1)=0.5/(0.85+1)=0.27.
Х-6=59
х=59+6
х=65
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65-6=59
59=59
6×х=60
х=60:6
х=10
------------
6×10=60
60=60
32:х=8
х=32:8
х=4
----------
32:4=8
8=8
х+41=63
х=63-41
х=22
------------
22+41=63
63=63
А)96:0,08=1200
Б)450:0,45=1000
В)182:0,7=260
1. 64*35 + 106*402 - 128/64 = 44850
64 * 35 = 2240
106 * 402 = 42612
128 : 64 = 2
2240 + 42612 - 2 = 44850
2. (8000 - 3988) * 105 - 945/5 * 100 = 402360
8000 - 3988 = 4012
4012 * 105 = 421260
945 : 5 = 189
189 * 100 = 18900
421260 - 18900 = 402360
3. 46839 - (322060 - 64 * 150) : 20 = 31216
64 * 150 = 9600
322060 - 9600 = 312460
312460 : 20 = 15623
46839 - 15623 = 31216
139/12.........................