1) 42,5×1,3=55,25(км)
2)42,5-1,9=40,6(км/ч)
3)40,6×2=81,1(км)
4)55,25+81,2=136,45(км)
1 = 2 + 2 – 2 - 2/2;
2 = 2 + 2 + 2 - 2 – 2;
3 = 2 + 2 – 2 + 2/2;
4 = 2 * 2 * 2 – 2 – 2;
5 = 2 + 2 + 2 – 2/2;
6 = 2 + 2 + 2 + 2 - 2;
7 = 22/2 – 2 - 2;
8 = 2*2*2 + 2 - 2;
9 = 2*2*2 + 2/2;
10 = 2 + 2 + 2 + 2 + 2;
11 = 22/2 + 2 - 2;
12 = 2*2*2 + 2 + 2;
13 = (22 + 2 + 2)/2;
14 = 2*2*2*2 - 2;
15 = 22/2 + 2 + 2;