In this lesson, we will learn how to add two consecutive numbers with sums up to 20 by finding one less than a doubles fact.
Students will be able to
Q1:
Notice that 3 is one less than 4.
If 4+4=8, which of the following is equal to 4+3?
Q2:
Use
Q3:
Amelia tried to solve 9+8 by using the doubling numbers facts, but she got the answer wrong.
Her teacher circled the mistake in her answer. Help her by finding 9+8.
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