Lesson 3.13.1 Small Group · Group 1
Group 1 · Set BSecond form · new problems, same idea
Learning target With my small group, I can write and describe a ratio that compares two quantities — one step at a time, with support.
Remember3.1 Small Group · Group 1
A ratio compares two amounts in order. Part to part compares two groups, and part to whole compares one group to the total. A ratio compares two amounts. We write the amounts in the order the words say.
Words: Ratio (Razón)Comparison (Comparación)Part-to-part (Parte a parte)Part-to-whole (Parte a todo)Colon notation (Notación con dos puntos)
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1Complete each step, then write the final answer.
A box has 7 red crayons and 2 blue crayons. The ratio of red crayons to all the crayons is 7 to ?. What is the missing number?
Show your workHint Fill the Total row: red and blue together. Add 7 + 2.
Final answer: -
2Complete each step, then write the final answer.
A plate has 6 cookies and 1 muffin. The ratio of cookies to all the treats is 6 to ?. What is the missing number?
Show your workHint All the treats means the cookies and the muffin together.
Final answer: -
3Complete each step, then write the final answer.
A soccer team played 11 games. It won 8 games and lost the rest. The ratio of games lost to games won is ? : 8. What is the missing number?
Show your workHint First find how many games the team lost.
Final answer: -
4Complete each step, then write the final answer.
A bag has 4 red beads, 2 green beads and 6 yellow beads. The ratio of green beads to all the beads is 2 to ?. What is the missing number?
Show your workHint All the beads means every color. Add all three groups.
Final answer:
Explain your thinkingBen wrote 3:4 for dogs to cats. Why does the order of the numbers matter in a ratio?
Sentence starter Dogs to cats is ___ because the words say ___ first. · If I switch the order, the ratio compares ___ to ___.