Easy Addition Facts Worksheet Page 35
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75A35
Hard Addition: The Doubles Plus 1 Facts
The ten frames are highly useful for demonstrating this strategy.
A Ten Frame for 4 + 5
Add 4 more
Add 1
more
Demonstrating the Strategy
You can use the tens frame to show near doubles facts. In the example above, you would
count, “one, two, three, four. We have 4, and now we are going to add 5 more. We can
break 5 into 4 plus 1. I add the 4 (5, 6, 7, 8) and 1 more. That gives us 9. 4 + 5 = 9.
That’s the same as 4 + 4 + 1. Notice the pattern.” Notice that the pattern reinforces the
concept of the doubles. That is, you begin by lining up 4 on the top. Next, match 4 on
the bottom. Then add one more.
Use a number of different facts to communicate the near doubles strategy. Note, a ten
frame will be confusing for near doubles that are greater than 5 + 6. Also, the larger
dots in the tens frame just demonstrate a change or in this case, what is added. In
class, you can use dots or chips that are all the same size.
General Guidelines
Remember, use the first page of the facts set to talk about the strategy. Give students
enough time to apply the strategy to the facts. For the remaining pages, use the mastery
criterion – at least 35 correct facts out of 40 in two minutes. Duplicate fact sheets if you
need to in order to give students enough practice to meet the mastery criterion. Also,
look over student sheets to see if particular facts are difficult for students. If so, provide
even more practice on these facts.
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