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Curriculum › Grade 3 › Mathematics

Time, Mass, Liquid Volume, and Graphs

  • Grade 3
  • Mathematics
  • 3.MD.A.1
  • Measurement & Data
  • ★ Enrichment

Aligned to 3.MD.A.1 — Common Core State Standards for Mathematics.

What this lesson teaches

You can tell time to the minute and figure out how much time has passed between two clock times. You can also measure mass in grams and liquid volume in liters, and draw a scaled bar graph where each square stands for more than one.

Worked examples

Example 1

A movie starts at 4:15 and ends at 4:50. From 4:15 to 4:50 is 35 minutes, so the movie lasted 35 minutes.

Example 2

Soccer practice runs from 3:40 to 5:10. From 3:40 to 4:00 is 20 minutes, then 4:00 to 5:10 is 70 more. In all, 1 hour 30 minutes.

Example 3

A jug holds 4 liters and you pour out 1 liter. 4 − 1 = 3 liters left. Liquid volume adds and subtracts just like any other number.

Practice questions

  1. How many minutes are between 2:10 and 2:45?
  2. Would you measure a glass of juice in grams or liters?
  3. On a bar graph where each square equals 2, how tall is a bar showing 8?

Watch the lesson

Every lesson comes with a video taught in English and Spanish — the same video the QR code in the printed workbook opens.

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En español

Tiempo, masa, volumen líquido y gráficas

Puedes decir la hora al minuto y calcular cuánto tiempo ha pasado entre dos horas del reloj. También puedes medir la masa en gramos y el volumen líquido en litros, y hacer una gráfica de barras a escala donde cada cuadro representa más de uno.

Ejemplo 1: Una película comienza a las 4:15 y termina a las 4:50. De las 4:15 a las 4:50 son 35 minutos, así que la película duró 35 minutos.

Ejemplo 2: El entrenamiento de fútbol va de 3:40 a 5:10. De 3:40 a 4:00 son 20 minutos, y de 4:00 a 5:10 son 70 más. En total, 1 hora con 30 minutos.

Ejemplo 3: Una jarra tiene 4 litros y sacas 1 litro. 4 − 1 = 3 litros quedan. El volumen líquido se suma y se resta como cualquier otro número.

More Measurement & Data lessons

Area3.MD.C.7Measure Mass and Volume3.MD.A.2Picture Graphs and Bar Graphs3.MD.B.3Measure Lengths and Line Plots3.MD.B.4What Is Area?3.MD.C.5Count Squares to Find Area3.MD.C.6

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