Math Practice 101
Homework Explained - Math Practice 101

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Grade 4 HMH Go Math - Answer Keys
Common Core


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Problem Solving • Comparasion Problems with Addition and Substraction

Use the information in the table for 1–3.

  • Question 1 (request help)

    How many square miles larger is the surface area of Lake Huron than the surface area of Lake Erie? 

    Think: How can a bar model help represent the problem? What equation can be written?
  • Question 2 (request help)

    Which lake has a surface area that is 14,938 square miles greater than the surface area of Lake Ontario? Draw a model and write a number sentence to solve the problem.
  •    
  • Question 3 (request help)

    Lake Victoria has the largest surface area of all lakes in Africa. Its surface area is 26,828 square miles. How much larger is the surface area of Lake Superior than that of Lake Victoria?
  •    square milles
  • Question 4 (request help)

    At 840,000 square miles, Greenland is the largest island in the world. The second-largest island is New Guinea, at 306,000 square miles. How much larger is Greenland than New Guinea?
  •    square miles

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