Proof Index
  • TOC
  • v2
  • Courses
  • Subreddit
  • Patreon
  • Blog
  • Search
    • ▾3rd grade
      • ▸Addition, subtraction, estimation
        • •Mentally add within 1000
        • •Round to the nearest 10 or 100
        • •Add and subtract within 1000, abstract
      • ▸Multiplication
        • •Multiplication using rectangular arrays and equal groups, concrete and visual
        • •Multiplication as repeated addition
        • •Multiply, abstract
      • ▸Division
        • •Divide using equal groups
        • •Division using repeated subtraction
        • •Divide, abstract
      • ▸Fractions
        • •Equal shares of shapes and unit fractions
        • •Plot fractions on the number line
        • •Relating fractions to 1
        • •Representing whole numbers as fractions
        • •Comparing fractions with like numerators, denominators, or both
      • ▸Relating multiplication and division
        • •Missing number problems, multiplication and division
        • •Relating multiplication to division
        • •Use properties to multiply and divide
        • •Multiply one-digit numbers by multiples of 10
      • ▸Arithmetic patterns and problem solving
        • •Two-step word problems
        • •Arithmetic and geometric sequences
        • •Patterns in addition and multiplication
        • •Intro to the triangular numbers
        • •Intro to the Fibonacci sequence
        • •Intro to Pascal's triangle
      • ▸Geometry
        • •Shape heirarchy
        • •Area of composite rectangles by counting unit squares
        • •Area and units of measure
        • •Area as multiplication
        • •Area, perimeter, and how they're related
      • ▾Time, measurement, and data
        • •Tell and write time, minute increments
        • •Measure and estimate volumes and masses
        • •Scaled bar and picture graphs
        • •Line plots with fractions
     › 3rd grade › Time, measurement, and data

    Tell and write time, minute increments

    Tell time to the minute. Solve addition and subtraction problems involving time in minutes. Solve word problems and mathematical ones.

    Here's an interesting word problem: How much daylight is there on a day when the sunrise is at 7:14 a.m. and the sunset is at 5:11 p.m.? (source)

    Answer: 9 hours, 57 minutes

    Watch these Khan Academy videos:

    • Time differences example
    • Telling time to the nearest minute (labeled clock)
    • Telling time with number line
    • Time word problem: travel time
    • Time word problem: puzzle
    • Telling time to the nearest minute (unlabeled clock)

    Do these Khan Academy exercises:

    • Time differences (within 60 minutes)
    • Time word problems with number line
    • Telling time word problems (within the hour)
    • Tell time to the nearest minute
    • Telling time on the number line

    Next, give your students this challenge:

    2019 Math Kangaroo Levels 1-2 Problem #21 by STEM4all

    Conclude by leading this investigation:

    Pillage and Profit (algebra)
    by MathPickle

    3.MD.A.1: Tell and write time to the nearest minute and measure time intervals in minutes. Solve word problems involving addition and subtraction of time intervals in minutes, e.g., by representing the problem on a number line diagram.

    Lessons and practice problems