In this lesson, we will learn how to use known doubles facts to add two consecutive numbers whose sum is within 20.
Q1:
Use
to find
Q2:
Q3:
Notice that 4 is one more than 3.
So the answer to 3 + 4 is one more than the answer to 3 + 3 .
If 3 + 3 = 6 , which of the following is equal to 3 + 4 ?
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