Exercises. Addition and subtraction of two natural numbers up to 20
These exercises will help to check how you are able to calculate the sum and difference of two natural numbers up to 20.
The solution of exercises is the best way to test your knowledge and understand studied material!
Exercise. Find the value of the sum (difference) of two integers:
18 ± 11 =
Exercises: 0 from 0 Result: 0 points

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