Mirror Maths

A Maths Starter of The Day

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]

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Keywords: Starter | Arithmetic | Puzzles | Symmetry

"80+101=181"

Aimee Hamilton, Harrytown Catholic High School
Thursday, March 08, 2007

 

"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"

Abigail Latham, Swinton
Saturday, March 10, 2007

 

"100+300+300+300=800
800x10=8000
0x10=0
300.08x10=3000.8
=]:D"

Abz :D, St Charles Rc Primary
Wednesday, March 14, 2007

 

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Answers
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

Here's an example where the calculation and the answer both have horizontal lines of symmetry?

l00 + l l l + l l + l l l = 333

If you can find any other interesting examples please let us know here.

 

Your next challenges are to make:

  • An equation with a horizontal and vertical line of symmetry

  • A mathematical ambigram

Ambigrams were made famous
in Dan Brown's novel "Angels and
Demons"