Example Question - mental math

Simple Arithmetic Problems

<p>а) \( 55 - 47 = 8 \)</p> <p>б) \( 75 - 66 = 9 \)</p> <p>в) \( 84 - 78 = 6 \)</p> <p>г) \( 34 - 19 = 15 \)</p> <p>д) \( 27 + 18 = 45 \)</p> <p>е) \( 18 - 18 = 0 \)</p> <p>ж) \( 8 + 12 = 20 \)</p> <p>з) \( 5 + 30 = 35 \)</p>