Page 15 - steps 3b.pdf

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• Mystery numbers ••••• • Rod lengths II • II II I Cuisenaire rods I
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PAGE 20 12+ 3 = 0 means 3x 0 = 12 means OJ Get one each
of these rods.
'How many threes in twelve?' 'How many threes in twelve?'
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12 +3 = 0 means the some as 3x 0 =12
OJ Copy and complete these. Try not to use materials to help. If you fit these two rods
rn a b 5 +1= 0 c 15+3= 0 together, they measure 8 cm.

1 x O =5 3x O =15 o 1 234 5 6 7 a
a 6 -7- 2= 3 -' . ~ .
2 x 3 =6 d 'i-='. I . -- -
e
10+2= 0
2x O =10 1 1 1 1 I 1 1 1 1 11111111
b 5 -7- 1 = 5
You can show the length 2cm 6cm
1 x 5 =5 I]] How many: like this.
8cm
c 15 -7- 3 = 5 a threes in nine b fives in twenty-five
c fours in seventeen d twos in seventeen
3x 5 =15 e fives in twenty-one fours in twenty-two? []] Drow lines to show pairs of rods which measure:
a 7cm b 14cm c 11 cm d 15cm
d 16 -7- 4= 4
4x 4 =16 CHALLENGE @] Now draw lines to show sets of three rods which measure:
a 13cm b 16cm c 20 cm d 17cm
e 20 -7- 5 = 4 Find at least 4 different answers to each of these.
5 x 4 = 20 a [] + 0 = 3 remainder 2 b 0 + 0 = 5 remainder 1 [II Find and draw different ways of making lengths of 20 cm.
Use rods of any colour to help.
f 10 -7- 2= 5 FE I STEPS 3b:s l I STEPS 3b:9! ED
2x 5 =10

00 Challenge rn 00
At least 4 examples similar to:
a three Practical: fitting rods together to Practical: drawing lines to show
a 8 -7- 2 = 3 remainder 2 make a given length. pairs of rods which measure:
b five
11 -7- 3 = 3 remainder 2 a 7cm b 14cm
C four remainder one ~
b 11 -7- 2 = 5 remainder 1 C 11cm d 15cm
d eight remainder one 16 -7- 3 = 5 remainder 1
Practical: drawing lines to show
17 -7- 5 = 3 remainder 2
e four remainder one sets of three rods which measure:
31 -7- 6 = 5 remainder 1 ~
f five remainder two 23 -7- 7 = 3 remainder 2 a 13cm b 16cm
46 -7- q = 5 remainder 1 etc. (1/3 a,b) Open: drawing different ways of
C 20cm d 17cm making up a length of 20 cm.