S=ПR2
r=5; S=25П
r=1/3; S=1/9П
r=0.12; S=0.0144П
1-8/15=7/15
3-2/11=2 9/11
4-3 4/9=5/9
7 3/8-5=2 3/8
45-44 3/8=5/8
6 7/15-3 1/5=6 7/15-3 3/15=3 4/15
10 3/23-7 19/46=10 6/46-7 19/46=2 33/46
16 2/5-4 3/7=16 14/35-4 15/35=11 34/35
19 5/12-8 17/18=19 15/36-8 34/36= 10 17/36
1. (0.085:0.425)^3=0.008
2. 4.208-0.008=4.2
3. 0.015*4.2=0.063
4. 0.063+2.937=3
5. 3^2=9