33 - It is the twins birthday for Carol and Tommy. There are two stacks of presents for Carol and Tommy. There are 15 presents in one stack and 18 in another stack. How many presents in total are there? , 50 - Carol unwrapped two boxes of puzzles. There are 25 pieces of puzzles in each of the boxes. How many puzzles pieces are there in total?, 21 - Tommy receives a box of Lego mini-figures. It comes with 12 mini-figures. He already had 9 of them. How many Lego mini-figures does he have now?,

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