This problem involves taking away objects from a group, which is subtraction.
Sarah starts with 8 apples
She gives away 3 apples
8 - 3 = 5 apples
Sarah has 5 apples left.
• Subtraction: Taking away from a group
• Keywords: "gives", "left" indicate subtraction
• Visual counting: Count remaining objects
This problem shows animals leaving a group, which requires subtraction.
There were 6 dogs playing
2 dogs went home
6 - 2 = 4 dogs
4 dogs are still playing.
• Subtraction: Removing from a group
• Keywords: "went home", "still" indicate subtraction
• Visual counting: Count remaining objects
This problem involves losing items from a collection, which is subtraction.
Tom had 9 toy cars
He lost 4 cars
9 - 4 = 5 cars
Tom has 5 toy cars now.
• Subtraction: Losing from a collection
• Keywords: "lost", "now" indicate subtraction
• Visual counting: Count remaining objects
Subtraction: Taking away one number from another to find what's left
Minuend: The number being subtracted from (top number)
Subtrahend: The number being subtracted (bottom number)
Difference: The answer in a subtraction problem
- Read the problem carefully - Look for key words
- Find the total amount - What we start with
- Find what is taken away - What is removed
- Subtract - Take away to find what remains
- Check your answer - Does it make sense?
• Always subtract the smaller number from the larger number in word problems
• Look for keywords that indicate subtraction
• Draw pictures to visualize the problem
• Count backwards to solve: 8, 7, 6, 5 (that's 3 steps back from 8)
• Check your answer by adding: 5 + 3 = 8 ✓
Practice 1: 7 - 2 = 5 cookies left
Practice 2: 10 - 3 = 7 birds still on tree