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Look at this stem-and-leaf plot:

Ages
 Stem  Leaves 
3     0
4     4 6
5     0 2 5
6     2 6 7 7 8
7     3 3
8     1 2 2 5 6 9
9     0


How many people are at least 40 years old?

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Fourth-grade skills Show expanded view
Number sense
Addition
Subtraction
Multiplication
Division
Mixed operations
Algebra
Functions
Coordinate graphs
Data, charts, and graphs
Logical reasoning
Patterns
Money
Measurement
Time
Geometry
Fractions and mixed numbers
Add and subtract fractions
Decimals
Add and subtract decimals
Probability and statistics