How many grams?

How many grams?

Pencil and paperOnline interactive
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
Further Resources
This task is about how much things weigh.

Question

a)  About how many grams does Bag A weigh? (Choose one)

    • 50 grams

    • 200 grams

    • 400 grams

    • 800 grams

Question

b)  About how many grams does Bag B weigh? (Choose one) 

    • 400 grams

    • 800 grams

    • 1200 grams

    • 1400 grams

Question 1Change answer

c)  Weigh each bag on the kitchen scales.
     Write your measurements in the table below.
Object

Measurement

Bag A

  grams

Bag B

  grams
Task administration: 

Equipment:

  • Two opaque bags weighing 400 g (labelled Bag A) and 800 g (labelled Bag B). The bags can be weighted with metric weights or grocery items. The bags will need to be able to fit on a set of kitchen scales. 
  • Kitchen scales with numbered markings at 200 g intervals.
For the estimation part of this task give each student a chance to feel the weighted bags. For the measurement part, let each student weigh the bags on a set of kitchen scales.
Level:
3
Curriculum info: 
Maths, Geometry and Measurement, Measurement
Keywords: 
estimation, weight, reading scales, practical
Description of task: 
In this practical task, students estimate, then measure, the weight of two bags using kitchen scales.
Curriculum Links: 
This resource can help to identify students' understanding of estimating and measuring weight/mass and reading scales .
Learning Progression Frameworks
This resource can provide evidence of learning associated with
Measurement sense, set 5
within the Mathematics Learning Progressions Frameworks.
Read more about the Learning Progressions Frameworks.
Answers/responses: 
 
a) 400 grams
b) 800 grams
c) 375-425
775-825
[If the kitchen scales are not accurate teachers will need to award marks for correct readings of the scale ± 25 grams.]