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Which addition expression is equal to ?
Think about taking away 9 from different numbers.
For example, the pictures show that 10 take away 9 is 1 and 11 take away 9
Look at these number sentences. Which one is WRONG?
Let us try to find 13 take away 9.
We can draw 13 dots as one group of 10 dots and one group of 3 dots.
Now take away 9 from the group of ten dots.
We are left with
dots which is 4 dots.
Now you have a go. What is
Sherif is baking cupcakes. He has 10 cupcakes cooling on the table, and 7 cupcakes in the oven. He puts icing on 9 of the cupcakes on the table. If all the cupcakes need to be iced by the end of the day, how many more cupcakes does he need to ice?
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