Grade 1
PrintNumber and Operation anchors Grade 1: counting to 120, place value with tens and ones, and addition and subtraction within 20. Algebra covers repeating patterns and the meaning of the equal sign. Geometry and Measurement address basic shape properties, ordering objects by length, and telling time to the half hour.
Example Problems
John and Lauren are looking for a good neighborhood to raise their children. They want neighbors who have kids and who are fellow rollerbladers as well. The couple surveys a random sample of residents in a nice-looking neighborhood. Their results are shown below.
Lena rollerblades every morning. Omar does not have children. Zoe is an artist, but that's all we know.
Calculate the following probability based on the frequency table below.
Probability that Lena has kids = ?
Write your answer as a percent.
Lena rollerblades every morning. Omar does not have children. Zoe is an artist, but that's all we know.
Calculate the following probability based on the frequency table below.
| Kids | No kids | Row total | |
|---|---|---|---|
| Rollerblader | 41 | 9 | 50 |
| Not a rollerblader | 3 | 9 | 12 |
| Column total | 44 | 18 | 62 |
Probability that Lena has kids = ?
Write your answer as a percent.
Solve the equation:
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