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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 › Add and subtract within 100

    Two-step word problems, add and subtract within 100

    Students will learn how to solve two-step word problems involving addition and subtraction. Here's an example problem: During a road trip, Steve ate 14 M&Ms and Carly ate 17. There are now 6 M&Ms left. How many M&Ms were in the bag before the road trip? This translates to 14 + 17 + 6. Conclude by leading this investigation. One additional puzzle can be found here.

    Watch these Khan Academy videos:

    • Multi step addition word problem
    • Multi-step subtraction word problem

    Do these Khan Academy exercises:

    • 2-step addition word problems within 100
    • 2-step subtraction word problems within 100

    Conclude by leading this investigation:

    Hare vs. Hare (patterns, algorithm)
    by MathPickle

    2.OA.A.1: Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

    Additional lessons and practice problems