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Near Doubles
If you know 7 + 7 = 14, then 7 + 8 is just one more: 15! This is called doubles plus one. You use a double you know and add 1.
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Math — Addition to 20
If you know 7 + 7 = 14, then 7 + 8 is just one more: 15! This is called doubles plus one. You use a double you know and add 1.