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The bottom half of some symmetrical calculations are shown above.
Can you work out the answers?
Can you make up some other calculations where the calculation and the answer both have horizontal lines of symmetry?
Can you make up some other calculations that have vertical lines of symmetry?
Topics: Starter  Arithmetic  Puzzles  Symmetry  Transformations
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Previous Day  This starter is for 10 March  Next Day
l l + 38 = 49 
88 x 33 = 2904 
838  383 = 455 
l 8 l x l l = 1991 
3 l + 3 l + 3 l = 93 
l 0 x l 0 l + l l l = 1121 
l 8 l x l 3 l  80 = 23631 
l 380 + 38  83 = 1335 
Your next challenge is to make an equation with a horizontal and a vertical line of symmetry or a mathematical ambigram
A Mathematical Ambigram is an expression or equation which can be read and has the same or a different meaning when rotated through 180 degrees. A simple example is:
88 + l l = l l + 88
Ambigrams were made famous in Dan Brown's novel "Angels and Demons"
Image From Wikimedia Commons created by Basile Morin. Creative Commons AttributionShare Alike 4.0 International license.
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Teacher, do your students have access to computers such as tablets, iPads or Laptops? This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments: Transum.org/go/?Start=March10 However it would be better to assign one of the student interactive activities below. 

Here is the URL which will take them to an activity about rotational symmetry.
The NonStatutory Guidance (for the English National Curriculum) states that
before beginning transforming shapes at Key Stage 3, students should already
have a
secure understanding of the following learning outcomes from study at
upper Key Stage 2:
Key ideas
Transum has a Starter which provides practice reflecting shapes on squared paper. It is called Reflective Cat.