Mathematics Grade 1 15 min

Subtraction facts - numbers up to 10

Subtraction facts - numbers up to 10

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1

Introduction & Learning Objectives

Learning Objectives Subtract numbers from 10 or less. Solve simple subtraction word problems. Use pictures and objects to show subtraction. Write a subtraction number sentence. Identify the minus (-) and equals (=) signs. Explain what 'difference' means. You have 5 yummy cookies 🍪. You eat 2 of them. How many cookies are left? Today, we will learn about subtraction! Subtraction is like taking things away. It helps us find out how much is left. Real-World Applications Sharing your toys with a friend 🧸. Eating snacks like apples or crackers 🍎. Using up crayons from your box 🖍️. Watching birds fly away from a tree 🐦.
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Key Concepts & Vocabulary

TermDefinitionExample SubtractionSubtraction means to take away one number from another. It finds out what is left.If you have 4 balls ⚽⚽⚽⚽ and 1 rolls away, you have 3 left. Minus Sign (-)This little line is the minus sign. It tells us to subtract!We read '5 - 2' as 'five minus two'. Equals Sign (=)This sign means 'is the same as'. It shows the answer to the problem.In '5 - 2 = 3', the = sign shows the answer is 3. DifferenceThe difference is the answer you get when you subtract. It's how many are left.In '5 - 2 = 3', the number 3 is the difference. Number SentenceA number sentence shows a math problem with numbers and signs.The sentence '8 - 3 = 5' tells a whole subtraction story.
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Core Formulas

Subtracting Zero Rule n - 0 = n When you take away zero, the number stays the same. Nothing changes! Subtracting Itself Rule n - n = 0 When you take away the same number, you have zero left. All gone! Fact Families If a + b = c, then c - b = a and c - a = b Addition and subtraction are opposites. They are part of a family!

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Sample Practice Questions

Challenging
Look at the pattern: 10, 8, 6, ___. What number comes next?
A.5
B.4
C.3
D.2
Challenging
Mia has 7 dolls. This is 3 more than Lily has. How many dolls does Lily have?
A.10
B.7
C.4
D.3
Challenging
Which story matches the number sentence 9 - 4 = 5?
A.I had 9 cookies. I got 4 more. Now I have 5.
B.I had 9 cookies. I ate 4. Now I have 5 left.
C.I had 5 cookies. I ate 4. Now I have 9 left.
D.I had 9 cookies. I ate 5. Now I have 4 left.

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