Page 42 - steps 4b 02.pdf

RM4q

•• Weight • • • • • • • • • 4b:20

Find the weights An activity for pairs or small groups

You need: standard weights (100 g, 500 g, 1000 9)i
kitchen scales (lOg divisions)i strong plastic bagsi
SCOOPi tub containing about 4 kg of grain (or sand)

OJ Using the 100 g weight to help you decide,
each of you puts what you estimate to be ~~
100 g of grain into your own bag.

Check your estimate by weighing your bag on the scales, ,
to the nearest lag. ...IQ ~(':"
:::\ tI:~'~..s-~-
On this table, record your estimate.
Then work out the difference in weight between it and 100 g. e

1 st try 2nd try 3rd try 4th try

Weight of grain (nearest 109)

Difference between
weight of grain and 100 g

~ Replace the grain in the tub and try again 3 more times.

~ Repeat stages OJ to ~ for 500 g and 1000 g.

/ 1 st try 2nd try 3rd try 4th try

Weight of grain (nearest 109)

~ . 0 Difference between
~~~~~ _______ ~ __ . e weight of grain and 500g

1 st try 2nd try 3rd try 4th try

Weight of grain (nearest 109)

Difference between
weight of grain and 1000 9

Did your estimates get better with practice?

What fraction of a kilogram are the smaller weights?

Estimating and measuring using standard weights.
Name
Date

© '994 HarperCollins Publishers STEPS 4b