Mathematics 6 Evaluate each expression. Underline the letter that corresponds to the best answer.(GEMDAS) 1.54-23 +18-9 = a.57 b.55 c.53
2.45049-8x4 = a.168 b.20 c.18 3.78-24+6x2+13= a.83 b.57 c.13 4.47+7x(15-6) +15= a.69 b.99 c.144
5.(90-30) -3 = 10-8= a.22 b.12 c.10