Math Practice 101
Homework Explained - Math Practice 101

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Grade 5 Eureka - Answer Keys Module 2
Lesson 4: Convert numerical expressions into unit form


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  • Question 1 (request help)

    Circle each expression that is not equivalent to the expression in bold.

    a. 37 x 19

    37 nineteens     (30 x 19) - (7 x 29)     37 x (20 - 1)     (40 - 2) x 19

    Not Equivalent:
    • 37 nineteens
    • (30 x 19) - (7 x 29)
    • 37 x (20 - 1)
    • (40 - 2) x 19
  • Question 1 (request help)

    b. 26 x 35

    35 twenty-sixes     (26 + 30) x (26 + 5)     (26 x 30) + (26 x 5)     35 x (20 + 60)

    Not Equivalent:
    • 35 twenty-sixes
    • (26 + 30) x (26 + 5)
    • (26 x 30) + (26 x 5)
    • 35 x (20 + 60)
  • Question 1 (request help)

    c. 34 x 89

    34 x (80 + 9)     (34 x 8) + (34 x 9)     34 x (90 - 1)     89 thirty-fours

    Not Equivalent:
    • 34 x (80 + 9)
    • (34 x 8) + (34 x 9)
    • 34 x (90 - 1)
    • 89 thirty-fours
  • Question 2 (request help)

    Solve using mental math. Draw a tape diagram and fill in the blanks to show your thinking. The first one is partially done for you.

    a. 19 x 50 = _____ fifties

    Think: 20 fifties - 1 fifty

         = (_____ x 50) - (_____ x 50)

         = _____ - _____

         = _____
  • 19 x 50 =     fifties
    The final result is    
  • Question 2 (request help)

    b. 11 x 26 = _____ twenty-sixes

    Think: _____ twenty-sixes + _____ twenty-six

         = (_____ x 26) + (_____ x 26)

         = _____ + _____

         = _____
  • 11 x 26 =     twenty-sixes
    The final result is    

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