Kindergarten 1: 24 + 36 = 60 Method: 20 + 30 = 50 4 + 6 = 10 50 + 10 = 60
Kindergarten 2: 83 – 35 = 48 Method: 80 – 30 = 50 50 – 5 = 45 45 + 3 = 48
Primary 1: 4 * 5 = 20 Method: 5 + 5 + 5 + 5 = 20
Primary 2: 36 / 4 = 9 Method: 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 = 36
Primary 3: 4/6 * 12 = 8 Method: 4/6 * 12 = 4/1 * 2 = 8/1 = 8
Primary 4: 3/8 / 1/2 = 6/8 Method: 3/8 / 1/2 = 3/8 * 2/1 = 6/8
Primary 5: 120 Method: 100% + 20% = 120% 120 = 1.20 180cm / 1.20 = 150cm 100% – 20 % = 80% 80% = 0.8 180cm * 0.8 = 120cm
Primary 6: 1700 Method: 405 – 150 = 255 15% = 0.15 255 / 0.15 = 1700
