3/8+0,45*5/18 помогите

Question

3/8+0,45*5/18 помогите

Answer 1

0,5 или 1/2

27/72 + 45/100 * 20/72

Answer 2

3/8 + 0,45 * 5/18 = 3/8 + 45/100*5/18 = 3/8 + 9/20*5/18 = 3/8 + 1/4*1/2 = 
= 3/8 + 1/8 = 4/8 = 1/2 = 0,5