🧮 Subtraction Within 20 — Think Addition to Subtract
Join Finn on this ocean learning adventure!
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Read the Story First!
🔤 Words to Know
Difference — The answer when you subtract.
Related facts — Addition and subtraction using the same numbers, like 7+3=10 and 10-3=7.
"15 fish, 8 swam away. How many left?" asked Finn.
Pearl said, "Think: 8 + WHAT = 15? 8 + 7 = 15. So 15 - 8 = 7!"
"That uses related facts!" said Pearl.
Finn tried: "13 - 6. Think: 6 + 7 = 13. Answer: 7!"
"The answer is called the difference," said Pearl.
🧠 Answer the Questions
Read each question carefully. Pick the best answer!
Question 1🧮 Math
15 - 8 = ?
Question 2🧮 Math
13 - 6 = ?
Question 3🔤 Vocabulary
What are related facts?
Question 4🧮 Math
12 - 5 = ?
Question 5🔤 Vocabulary
What is the difference?
Question 6🧮 Math
If 9 + 4 = 13, then 13 - 4 = ?
Question 7🧮 Math
16 - 9 = ?
Question 8📖 Comprehension
How did they solve subtraction?
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Quiz Complete!
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