Sequence 1,5 / 4,5 / 3,17 / 8,13 / 5 A general term formula of

Sequence 1,5 / 4,5 / 3,17 / 8,13 / 5 A general term formula of


(n^2+1)/(2n)



25.25 * (3.2 / 38) * 6.1 what is the simple method


There is no easy way to solve this problem!
Because: 101, 19, 61 are prime numbers. They can only be calculated step by step



A simple method of 0.17 + 0.456-0.17 + 0.45


0.17-0.17+0.456+0.45
=0.456+0.45
=0.906



A simple method of 17.5 × 0.25 + 12.5 △ 4


17.5×0.25+12.5÷4
=17.5×0.25+12.5×1/4
=17.5×0.25+12.5×0.25
=(17.5+12.5)×0.25
=30×0.25
=7.5