Find here an unlimited supply of printable worksheets for addition of whole numbers and integers, including both horizontal and vertical problems, missing number problems, customized number range, and more. The worksheets are available both in PDF and html formats, are highly customizable, and include an answer key.
By controlling the range in the generator below, you can use negative numbers (integers), numbers less than 10, very large numbers, and so on. You can limit the numbers to be multiples of ten, hundred, thousand, or a multiple of any other number by using the "Step" option in the generator.
With the advanced options you can create missing number worksheets, addition problems with 3-6 addends, and additions without carrying (regrouping).
The option Switch addends randomly switches the order of the numbers to be added. For example, if you set addend 1 to be multiples of ten and addend 2 to be multiples of hundred, you will get such problems as 20 + 300 and 400 + 70.
Or, if you set the addend 1 to be negative and addend 2 positive, the option Switch addends randomly makes the negative number sometimes to be first, sometimes second.
To create integer addition problems where the negative numbers occur in any order, set one addend to be negative, another positive, the third one from negative to positive range (such as -10 to 10), and use the option Switch addends randomly.
To create problems about place value, let the range for the first addend to be 0-9, for the second addend from 0 to 90 with step 10, for the third addend from 0 to 900 with step 100, and so on. Then tick the bode for Switch addends randomly and Missing addend options.
These are randomly generated. Once you make a worksheet, you can get another of the same kind by refreshing the page in your browser (press F5 from keyboard).
You can find many more ready-made mental addition worksheets on these pages: