Question - Simple Arithmetic Problems

а) \( 55 - 47 = 8 \)

б) \( 75 - 66 = 9 \)

в) \( 84 - 78 = 6 \)

г) \( 34 - 19 = 15 \)

д) \( 27 + 18 = 45 \)

е) \( 18 - 18 = 0 \)

ж) \( 8 + 12 = 20 \)

з) \( 5 + 30 = 35 \)