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• . Weighty pro~lems balance 9cales, 50g • 2-place decimals •
and 200g weights,
Plasticene
OJ Cut out a 10x10 grid
from the squared paper.
~ a Colour some of the squares.
b Glue the grid in your book.
c Underneath, write the fraction coloured
and the fraction not coloured
as 2-place decimal numbers.
d On your calculator, add these together
to make sure they total 1.
e Record the sum underneath. 1 ____ . ___ ----'
0'4-1 c.doo(ecl
OJ Work out the weight of the food from each basket. o· 53 not c.oloO(ed
0'4-7+0·53= I
@] Repeat OJ and ~ two more times. Practical: cut out a
lOx 10 grid from
m Design and write about
a symmetrical pattern like this: _
squared paper.
b c d
~ How much heavier is the bag of rice than the cabbage? ,
@] There are· 1 0 biscuits in the packet. What does each one weigh?
Open: colouring some
GJ A box of cereal holds 10 servings. Work out the weight of each serving. of the squares,
recording fraction
CHALLENGES
@] Design another pattern with 2 lines of symmetry 0'.24-+0'3.;). +0'44-::/
• A cat and its kitten have a total weight of 3 kg. so that 0·08 is yellow and 0·56 blue . coloured and fraction
The cat weighs 2000 g more than the kitten. What does the kitten weigh? not coloured as
[]] a Use the grids on RM 68.
• Use only balance scales, a 50 g weight, a 200 g weight and Plasticene. b Colour squares on pairs of grids. 2-place decimal
Write about ways to make lumps of Plasticene which weigh:
c Use> or < to compare them .
a 250g b 150g c 100g d 50g e 25g numbers, check on
d Glue them in your book.
calculator that these
Ii make a total of 1.
rn [gJ 00 ~ 00

a 1200g b 570g 650g 15g 60g Open: repeating [I] and [g] . Open: designing and writing about
a symmetrical pattern using one,
c Q50g d 3kg
two or three colours.
Challenge

The kitten weighs 500g. Open: designing another pattern Open: using pairs of grids on RM
a Balance Plasticene against 200g + 50g weights. with 2 lines of symmetry so that 68, colouring in squares and
b Balance 200g weight against 50g weight and Plasticene. 0.08 is yellow and 0.56 is blue. comparing the grids using> and <.
c Weigh out 200g of Plasticene, then use balance to split it into two halves.
d Weigh out 50g of Plasticene.
e Split Plasticene from d into two halves and weigh against each other.