Lesson 1.11.1 Small Group · Group 1
Group 1 · Set BSecond form · new problems, same idea
Learning target With my small group, I can describe the ways we are all doers of math, and compare my math story with a classmate's — one step at a time, with support.
Remember1.1 Small Group · Group 1
To estimate, find equal groups and multiply easy numbers, and to decompose, break a number into parts that rebuild it exactly. We all do math. We can estimate with easy numbers, and we can write one number in many ways.
Words: doer of math (persona que hace matemáticas)math story (historia matemática)strength (fortaleza)decompose (descomponer)estimate (estimar)
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1Complete each step, then write the final answer.
The bleachers at a game have 10 rows. About 25 people fit in each row. About how many people can sit in the bleachers?
Show your workHint Multiply the number of rows by the people in each row: 10 × 25.
Final answer: -
2Complete each step, then write the final answer.
A shelf has 8 rows. About 20 books fit in each row. About how many books fit on the shelf?
Show your workHint Multiply the rows by the books in each row.
Final answer: -
3Complete each step, then write the final answer.
Lunch costs about $3 each day. About how much does lunch cost for 15 school days?
Show your workHint Each day is one equal group of about $3.
Final answer: -
4Complete each step, then write the final answer.
Write 37.5 as a number times 3. What is the number?
Show your workHint The number times 3 must rebuild 37.5. Divide 37.5 into 3 equal parts.
Final answer:
Explain your thinkingWhy is 30 × 6 an estimate of the riders, and not an exact count? When is a close number good enough?
Sentence starter It is an estimate because ___. · A close number is good enough when ___.