Mental maths

For me, I do:

7 + 9 = 16 (which further breaks down into 9 + 1 = 10, 10 + 6 = 16, but we’ll ignore that)

20 + 80 = 100

100 + 16 = 116

How about you?

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Just have a cry

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27+80=107
107+9=116

27+90 = 117
117-1 = 116

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20 + 80 = 100
7 + 9 = 16
100 + 16 = 116

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89+11=100
27-11=16
100+16=116

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Adding an extra one! Madness!

Can do maths in my head very well but usually only if it’s prices. Ask me what 287+1562 is and not a clue but £2.87+£15.62? Easy.

I’ve gone cross-eyed trying to do this in my head

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Easier to round up the nearest one to a round number then work downwards I find.

200 + 800 = 1000
70 + 90 = 160
1000 - 160 = 840
Remove the zero = 84

84

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article-1215324-02C5BBDA000005DC-582_468x364

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7 + 89 = 96
96 + 20 = 116

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I like to do the little bits first, not sure why

90+27-1

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20+80 then 7+9

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Don’t engage the brain for less than a grand

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This, was starting to think I was on my own

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I want @pervo’s answer