In the first line the circle is worth 1.
I worked this out by adding 17 and 7 together = 24 then add 1
=25
In the second line the circle is worth
20.
I worked this out by adding together 17,7,7 =31 add 20 =51
In the third line the circle is worth 44.
I worked this out by adding together 17,17,7 and 7 =38
In the fourth line the circle is worth
16.
I worked this out by doing 48 divided by 3 =16
In the fifth line the circle is worth
27.5
I used the same method as the 1st 2nd and 3rd line.
Christopher and Matthew explain further about the final answer:
On the last one the total was 100.We had to add 17 + 7 + 7 + 7 +
7 = 45.
This meant there was 55 left which we halved to get the answer 27
and a half.
Matthew from Worth School agreed with the answers given above but has recorded his thinking differently. "I looked at it as an equation", wrote Matthew. What Matthew already knows: Triangle = 7, Rectangle = 17 and he uses C= circle
1.
If 17+C+7=25 then C =?
This can be rearranged as:
25-(17+7)=C
25-24=C
1=C
2.
If 17+7+7+C=51 then C=?
This can be rearranged as:
51-(17+7+7)=C
51-31=C
20=C
3.
If 7+7+17+17+C+C=136 then C=?
This can be rearranged as:
136-(7+7+17+17)=2C
136-48=2C
88=2C
44=C
4.
If C+C+C=48 then C=?
This can be rearranged as:
48=3C
48/3=C
16=C
5.
If 7+C+7+17+7+C+7=100 then C=?
This can be rearranged as:
28+17+2C=100
45+2C=100
2C=100-45
2C=55
C=27.5
Thank you also to sets of Moorfield pupils,
Niall and Adam,
Steven and Matthew, Christopher,
Elliot and Luke, Hannah, Amy and
Emma, Thomas and Robert, as well
as to Abi. From Ms Flynn's class in
Ringmer County Primary in Sussex, we heard from
Nick and Tom. Ellen,
Stacie, Rosie and Natasha, from
St. Aldhelm's Combined School all sent in the mail
their calculations to this set of problems. Carla
and Georgia from Tattingstone Primary
School in Suffolk both sent their work as email
attachments. Well done also to 7 year-old
Mithran.
Each one of you put a lot of effort into your work and your
explanations were clear and well thought out.