1) 2^(-6/5) * 2^(-4/5) = 2^(-6/5-4/5 ) =2^ (-10/5) =2^(-2) =1/4
2) 49^ 1/2 = √49 =7
3) 1/4 +7 =7 1/4 =7,25
1) 0.4 * 30 =12
2) 0.5 * 18 = 9
3) 0.1 * 6.5 = 0.65
4) 2.5 * 40 = 100
5) 0.12 * 100 = 12
6) 0.01 * 1000 = 10.