Mathematics Grade 2 15 min

Add doubles - complete the sentence

Add doubles - complete the sentence

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Introduction & Learning Objectives

Learning Objectives Identify a doubles fact. Explain that 'double' means adding a number to itself. Solve addition sentences for doubles from 1+1 to 10+10. Complete a sentence that asks for a double, like 'Double 4 is ___.' Write their own 'add doubles' number sentence. Recall at least five doubles facts from memory. Have you ever seen twins? πŸ‘―β€β™€οΈ They are a double! What happens when we double numbers? Today, we will learn a super-fast math trick called doubles! ✨ We will add a number to itself. This helps us solve problems and complete sentences very quickly. Real-World Applications Counting pairs of socks 🧦 + 🧦 Sharing cookies with a friend so you both have the same amount πŸͺ + πŸͺ Figuring out how many legs two cats have 🐈 + 🐈...
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Key Concepts & Vocabulary

TermDefinitionExample DoubleA double is two of the exact same number added together.Double 3 is the same as 3 + 3. πŸ“πŸ“πŸ“ + πŸ“πŸ“πŸ“ AddTo add means to put numbers together to find the total.We add 5 and 5 to get 10. πŸ–οΈ + πŸ–οΈ SumThe sum is the answer you get when you add numbers.In 4 + 4 = 8, the sum is 8. πŸš—πŸš—πŸš—πŸš— + πŸš—πŸš—πŸš—πŸš— = 8 cars Equal Sign (=)The equal sign means 'is the same as'.2 + 2 = 4 means 2 + 2 is the same as 4. βœ… Number SentenceA number sentence is a math problem with numbers and signs.6 + 6 = 12 is a number sentence. 🐸🐸🐸🐸🐸🐸 + 🐸🐸🐸🐸🐸🐸 = 12 frogs
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Core Formulas

The Doubles Addition Rule number + same number = sum To find a double, you just add a number to itself. This is the main pattern for all doubles facts. The Sentence Completion Rule 'Double [number] is ___' means '[number] + [number] = ___' When a sentence asks for a 'double', it's a secret code! It's telling you to add the number to itself to find the answer.

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Sample Practice Questions

Challenging
The sentence is ___ + ___ = 12, and the two missing numbers are the same. What would be the number sentence for the next double up?
A.6 + 6 = 12
B.7 + 7 = 14
C.8 + 8 = 16
D.5 + 5 = 10
Challenging
We know double 5 is 10 and double 4 is 8. The sentence to find the difference between these two doubles is 10 - 8 = ___.
A.2
B.4
C.18
D.1
Challenging
A recipe needs 2 cups of flour. You double it, so the sentence is 2 + 2 = 4. If you double the recipe AGAIN, what is the new sentence for the total flour?
A.2 + 2 = 4
B.3 + 3 = 6
C.6 + 6 = 12
D.4 + 4 = 8

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