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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?
[Teacher: pull down the mirror at the top of the screen to show the top halves of the calculations]
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 Ambigrams were made famous in Dan Brown's novel "Angels and Demons" 

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Teacher, do your students have
access to computers? 

Here a concise URL for a version of this page without the comments.
Here is the URL which will take them to an activity about rotational symmetry.