Class VI

Estimating Length

Lesson

Estimating

When we estimate we're making a smart guess about something. Estimating isn't always completely accurate but can give us a rough idea of a length.

Just like when measuring, it's important to think about the units we're using to estimate.

If something is really tall, like a skyscraper, would it be best to use millimetres, metres or kilometres to estimate the height? Millimetres would be too small, and kilometres would be too big. The best unit to use would be metres.

Sometimes it's easiest to think of other things that might be a similar length.

Worked Examples

QUESTION 1

Choose the best estimate for the length of a $classroom$ .

$4$4 metres.
A
$60$60 metres.
B
$100$100 metres.
C
$10$10 metres.
D

QUESTION 2

Write down the measurement marked with an X.

Question 3

Outcomes

6.NS.KN.3

Word problems on number operations involving large numbers up to a maximum of 5 digits in the answer after all operations; including conversion of units of length and mass, estimation of outcome of number operations

6.NS.F.3

Word problems involving addition and subtraction of decimals (two operations together on money, mass, length and temperature)