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Fifteen cartons of milk are at the grocery store. Nine go bad and have to be thrown away. How many cartons of milk are left at the grocery store?

cartons of milk
 
Second-grade skills Show expanded view
Counting and number patterns
Comparing and ordering
Names of numbers
Patterns
Addition - one digit
Subtraction - one digit
Addition - two digits
Subtraction - two digits
Addition - three digits
Subtraction - three digits
Properties
Mixed operations
Place values
Estimation and rounding
Logical reasoning
Money
Time
Data and graphs
Measurement
Geometry
Fractions
Probability and statistics
Multiplication
Division