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    • ▾2nd grade
      • ▸Add and subtract within 20
        • •Add to count rectangular arrays
        • •Mentally add and subtract within 20
      • ▸Place value
        • •Place value with hundreds
        • •Convert between various representations, numbers within 1000
        • •Counting and skip-counting within 1000
        • •Intro to even and odd
        • •Compare three-digit numbers
      • ▸Add and subtract within 100
        • •Mentally add and subtract within 100
        • •Add and subtract within 100, abstract
        • •One-step word problems, add and subtract within 100
        • •Two-step word problems, add and subtract within 100
      • ▸Add and subtract within 1,000
        • •Add and subtract within 1,000
        • •Add multiple two-digit numbers
        • •Mentally add or subtract powers of ten
      • ▸Money and time
        • •Money word problems, including dollars
        • •Tell and write time, five minute increments
      • ▾Measurement
        • •Compare lengths by measuring
        • •Estimate lengths
        • •Add and subtract within 100 to solve word problems involving lengths
        • •Add and subtract within 100 on the number line
      • ▸Data
        • •Plot measurements on a line plot
        • •Draw picture and bar graphs
      • ▸Geometry
        • •Partition rectangles into rows and columns
        • •Area of a rectangle by counting unit squares
        • •Partition circles and rectangles into equal shares
        • •Draw shapes with certain attributes
        • •Intro to tessellations
     › 2nd grade › Measurement

    Add and subtract within 100 to solve word problems involving lengths

    Students will learn how to use addition and subtraction within 100 to solve word problems involving lengths in inches or feet. No problem will involve both a measurement in inches, and a measurement in feet.

    Length word problem example (US Customary) by Khan Academy

    Length word problem (US customary)

    Next, students will learn how to use addition and subtraction within 100 to solve word problems involving lengths in centimeters and meters. No problem will involve both a measurement in centimeters, and a measurement in meters.

    Length word problems by Khan Academy

    Length word problems by Khan Academy

    Next, give your students this challenge:

    2019 Math Kangaroo Levels 1-2 Problem #18 by STEM4all

    Conclude by leading this investigation:

    Bubbling Cauldrons (single digit addition)
    by MathPickle

    2.MD.B.5: Use addition and subtraction within 100 to solve word problems involving lengths that are given in the same units, e.g., by using drawings (such as drawings of rulers) and equations with a symbol for the unknown number to represent the problem.