Thursday, 25 August 2016

Using a range of multiplicative strategies.

In Maths we have been learning to use a range of multiplicative strategies when operating with whole numbers.

The strategies we have been learning are:

- Estimate the reasonableness of large problems like 1 788 – 891. Could 497 be right?
- Use multiplication to solve addition and subtraction problems eg.
  64 – 48 = as (8 x 8) – (6 x 8) = 2 x 8= 16
- Use doubling / halving, trebling/ thirding and adjusting to solve multiplication problems,
 eg.  12 x 50 solved as 4 x 150= 600
- Use an algorithm to solve multiplication problems.
- Solve problems using simple cube numbers .
- Use an algorithm to solve division problems.

MATHS Rich Assessment Task

WALT:  Use appropriate scales, devices, and metric units for length, area, volume and capacity, weight
Measuring is about making a comparison between what is being measured and a suitable measurement unit. Central to the development of measuring skills is lots of practical measuring experience. Also important is the reality that measurement is never exact.
Required Resource Materials:
  • Oranges
  • Measuring equipment including; rulers, scales, measuring jugs.
Activity: Complete the questions below:
  1. How can you measure an orange? (there will be multiple answers for this, list as many as you can think of). Think of the attributes of an orange eg juice.
  2. Choose two of these attributes of an orange to measure and carry out the task. Write up a proposal for your investigation, including details on:
    • Attribute being measured
    • Equipment required
    • Method (step by step)
    • How will you present your results?
    • Write up your results
  1. What were successful/unsuccessful approaches to measuring each of your chosen Attributes? Why?
  2. Choose 4 other objects to measure in the class - use 4 different measurements eg measure the length of something and the weight of something else. Write up your results in a table.

Inside the orange
65 Grams
200 Grams
62 Grams
25 Grams

Altogether after deconstructed

Pencil case
300 grams
20 cm
6 cm
80 cm
Weight               Length               Width              Height