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Ratio Detective
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Ratio Detective
📚 Part 1: Quick Check — Multiple Choice
1. Which choice best defines a ratio?
A comparison of two quantities by division
A method for adding fractions
A way to measure angles
2. Which shows "5 to 12" in the three correct forms?
5:12, 5/12, "5 to 12"
12:5, 12/5, "12 to 5"
5:12, 12/5, "5 by 12"
3. Simplify the ratio 9:12.
3:4
9:4
4:3
4. Check all that are equivalent to 2:3.
4:6
6:9
3:2
8:12
✏️ Part 2: Short Answers & Word Problems
5. Write the ratio of 7 boys to 14 girls in three forms:
Use formats: colon, fraction, and words (for example: "a to b").
6. If 5 pencils cost $10, what is the ratio of pencils to dollars? Simplify.
7. A recipe uses 2 cups of flour for every 3 cups of sugar. If you use 6 cups of flour, how many cups of sugar do you need? Show your work.
8. Give one real-world example of a ratio from home or school. Write the ratio in colon form and explain briefly why it is useful.
🕵️♂️ Part 3: Detective Challenge — Match Equivalent Forms
9. Draw a line to match each phrase (left) with the equivalent numeric form (right).
A. "Four to nine"
B. "Three out of eight" (ratio)
C. "Ten to five"
1. 10:5
2. 4:9
3. 3:8
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