Students work towards CCSS.MP1: Make sense of and persevere through problems with this introductory lesson. Students learn to visualize what is happening in the problem.
Information about the life of Gabriel Cramer (1704-1752 CE), 18th century mathematician credited with "Cramer's Rule," though "Cramer was certainly not the first to give this rule."
Models how to solve a two-step word problem involving multiplication and addition or subtraction by drawing a picture and writing equations. [3:32] CCSS.Math.Content.3.OA.D.8 Solve two-step word problems using the four operations.
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