1) A bus is carrying 15 pupils. At a park, 7 other pupils board the bus. Calculate the total number of pupils. a) 15-7=8 b) 15+7=22 2) Mother bought 48 eggs. She cooked 12 eggs. How many eggs were left? a) 48-12=36 b) 48-12=60 3) Ah Meng's father breed 52 chicks. 6 chicks are sick. Calculate the number of chicks which are not sick. a) 52+6=58 b) 52-6=46 4) Saw Yao Zhu has 20 balloons. 10 of them burst. How many balloons are left? a) 20-10=10 b) 20+10=30

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