1 целое 7/8 × (5/8+1,3)-2,45

Question

1 целое 7/8 × (5/8+1,3)-2,45

Answer 1

1 7/8 * ( 5/8 + 1,3 ) - 2,45
1) 5/8 + 1,3 = 5/8 + 13/10 = 25/40 + 52/40 = 77/40
2) 1 7/8 * 77/40 = 15/8 * 77/40 = 231/64
3) 231/64 - 2,45 = 231/64 - 245/100 = 231/64 - 49/20 = 371/320 = 1 51/320