Converting Metric Units Study Guide

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Mar-02
Converting Metric Units
Overhead transparencies for use in Numeracy Level 1 group teaching sessions.
Ideas and suggestions:
Explain that when converting from large
point (use the arrows in the OTs to
units to small units (e.g. m to cm) you
reinforce this) or the position (place value)
multiply. When converting from small units
of the digits (place value charts are
to large units (e.g. g to kg) you divide.
available on our site under “General
Stress the importance of estimating what
Numeracy Resources”).
size answer is sensible i.e. if converting c m
Check that students understand that
to mm you would expect there to be lots of
dividing by 100 (for example) can be broken
millimetres (so multiply). Demonstrate with
down into two steps. i.e. divide by ten and
a ruler that is marked in both mm and cm.
then divide by ten again. The arrows on the
Ensure students understand place value.
OTs show how to convert units in “steps”.
Explain this in terms of moving the decimal
Give each student a copy for reference.
Main Curriculum Links
Measure Shape and Space: Common Measures
MSS1/L1.7 Convert units of measure within the same system
Know the re lationship between metric units
Examples from curriculum:
Compare dimensions of furniture or appliances in cm and mm.
Convert measurements to the same units to work out an area
Sample activities from curriculum:
Convert measurements of length fro m one metric unit to another, e.g. mm to cm, m to cm.
Convert measurements of weight fro m one metric unit to another, e.g. kg to g.
Convert measurements of capacity fro m one metric unit to another, e.g. l to ml.
Use a table for common imperial measures for weight, length and capacity to convert between pounds
and ounces, feet and inches, pints and gallons in practical situations.
Number 1: Whole Numbers
N1/L1.4 multiply and divide whole numbers by 10 and 100
Understand place value for whole numbers and to 2 decimal places
Examples from curriculum include:
Change whole metres to whole centimetres and vice versa
Change centimetres to millimetres and vice versa
Sample activities from curriculum include:
Use a calculator to investigate multiplying whole numbers by 10, 100. Start with one digit numbers,
then 2 digit, etc. Deduce “rules” from patterns (beware of rules expressed as “add a nought” etc.).
Repeat for division. Investigate: “Knock off a nought” won’t work if number doesn’t end in zero, etc.
Number 2: Fractions, decimals and percentages
N2/L1.6 multiply and divide decimals by 10 and 100
Understand place value for whole numbers and to 2 decimal places
Examples from curriculum include:
Change metres to centimetres and vice versa.
Sample activities from curriculum include:
Practise converting measurements from one metric unit to another.
Contents
Page 1 - This page.
Page 3 – OT / handout. Metric units of mass.
Page 2 – Overhead transparency (or handout).
Convert between tonnes, kilograms and grams.
Metric units of length. Convert between
Page 4 - OT / handout. Capacity. Convert
kilometres, metres, centimetres, millimetres.
millilitres, centilitres, litres, cubic metres.
Adult Numeracy (Level 1)
- 1 -

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