Mental arithmetic level 0
These are not interactive exercises -you need pen and paper to write your answers down.
Doubles
Adding two whole numbers
smaller than 10
Multiplying by 10 and 100
Halves
Adding with a number
sending in '9'
Dividing by 10 and 100
Complements
to 10
Additions
Operations with holes
Complements
to the tenth
Comparing two whole numbers
The date
25 and others
Subracting one whole number
smaller than 10
Which century ?
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