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You have to find value of the sum (difference) of two natural numbers, write the answer and push the button "Submit".

You have to push the "Next task" button for move to the next task.Attention!!! At move to the new task this example becomes inaccessible.

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Welcome to OnlineMSchool. This web site owner is mathematician Dovzhyk Mykhailo. I designed this web site and wrote all the mathematical theory, online exercises, formulas and calculators.

If you want to contact me, probably have some question write me email on suppotr@onlinemschool.com