Topics: Starter | Arithmetic | Puzzles | Symmetry | Transformations

• Aimee Hamilton, Harrytown Catholic High School
•  
• 80+101=181
• Abigail Latham, Swinton
•  
• Hello.
  Im Abigail Latham From St. Charles Rc Primary School Swinton Manchester
  And I Found That 300+100+300+300=1000
  30+30+30+10=100
  10x10=100
• Abz :D, St Charles Rc Primary
•  
• -100+300+300+300=800
  800x10=8000
  0x10=0
  300.08x10=3000.8
  =]:D
• Alice K, St Matts
•  
• 100 + 88 +111 +1 = 300.
• Primary 7, Bargeddie Primary School
•  
• We enjoyed this starter, especially since one of our groups are studying symmetry...
  Here are some of our examples:
  333 - 333 + 1 = 1
  33 x 3 + 1 = 100
  11 x 3 = 33
  111 - 111 + 8 = 8
  Callum in our class also noticed that multiplying any combination of multiples of 10 would give a symmetrical answer:
  e.g. 1000 x 1000, 1 000 000 000 x 1000, 10 x 100 000 000 000 etc.
• Mr. T, Gartree High School
•  
• Good for younger groups like year 7s since the sums are pretty straight forward but they liked trying to work out how to reflect the digits.
• Prendergast, 9.1 Maths
•  
• 11 + 11 + 11 = 33
  11 + 11 + 38 + 10 + 10 = 80
  8 x 1 = 8
  11 x 3 = 33
  11 x 8 = 88
  13 + 18 = 31
  3 x 1 = 3
  1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 = 8
  1 + 1 + 1 = 3
  symmetrical number x 0 = 0.
• Tomiloba Awosika, Bishop Challoner School
•  
• Tomiloba from Bishop Challoner School 8B3 has come up with an example - 300 + 300 + 300 - 100 = 800.
• Elliot, 7X3WO
•  
• 10+0=10.
• Octavia Pullman, London School Of Rock, London
•  
• 30+8= 38.

How did you use this starter? Can you suggest how teachers could present or develop this resource? Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.
Click here to enter your comments.

Previous Day | This starter is for 10 March | Next Day