Meet Zequals, a mental math tool

Can some simple rounding help us be more accurate and confident with mental math? The man behind this symbol proposes just that:

Zequals

And it turns out it’s fairly accurate:

Zequals accuracy

Basically, using some simplification of numbers we can do mental multiplication more accurately (generally). Confused by the squiggles and colors? Don’t be intimidated.

Read more: Zequals: the new symbol that will make us all better at sums | Rob Eastaway | Science | theguardian.com

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