Page 43 - steps 3b.pdf

44
• Using scale • • • • • • • • / .
~:I.I.J;!I5I'~ ~;;tJt4~~
PAGE 76 OJ Pierre Frog is sitting on step +2.
Write where he will land if he:
a hops up 2 steps
c hops down 3 steps
These things are drawn so they are one-fifth as big as they really are.
They are drawn to one-fifth scale.
OJ Estimate how many centimetres long each was before it was drawn.
a 0== b <»== D
c ~ 0::>

d

f L Z

W Now measure their length and _ I Drawing I sc~~:i~~;th I Real length
copy and complete this table.
@J Draw to one-fifth scale: a
a a toy truck which is b
really 25 cm long.
c
d
e
Write down different pairs 'of step numbers
to make this true.
Start on step_. Hop down three steps. l_lmd on step_ . m
fD

IT] [g] IT]

Estimating lengths of Drawing 1/5 scale length Real length a +4 b 0 c -1 d -4
real objects from scale a 1cm 5cm
drawings. Reasonable
estimates would be b 3cm 15cm [g]
within about 5cm of: c 10cm 50cm b -7 d -5 f 0 h -6
d Bcm 40cm a +2 c +5 ~ -7 g -1
a 5cm b 15cm e 6cm 30cm
Challenge
c 50cm d 40cm f 7cm 35cm
Writing down different pairs of step numbers for:
e 30cm f 35cm
Start on step _. Hop down three steps. Land on step _. (1/3 b)
00
Practical: drawing to one-fifth scale.

a~VY\
~ C\'V\