Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison.
Understand that a symbol represents an unknown variable in an equation.
Distinguish when a word problem is asking to solve using a multiplicative or additive comparison.
Distinguish the difference between multiplicative comparison (e.g., Maria has 9 stickers. Joe has 3 times as many stickers as Maria. How many stickers do they have altogether?) and additive comparison (e.g Maria has 9 stickers. Joe has 3 stickers. How many more stickers does Maria have?)
Solve a word problem by creating an equation using a variable or symbol to represent the unknown number.
Represent multiplicative comparisons in word problems using models, illustrations, and/or writing.