A selection of our very best maths resources entirely free, updated each month.
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Add a 2-digit number to a multiple of 10, speed challenge.
Add 19 to any 2-digit number.
Add 21 to any 2-digit number.
Add a single digit number to a multiple of 100, with no additional help.
Add a single digit to a 3-digit number crossing the tens boundary.
Add a multiple of 10 to a 3-digit number, crossing 100.
Add mentally a single digit to a 3-digit number, not crossing the tens.
Add two 3-digit multiples of 10 not crossing the tens or hundreds boundaries.
Add multiples of 100 up to 1 000.
Add mentally a single digit to a 3-digit number.
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