Add a number near 1,000

Today we are going to look at a quick way that you can add numbers such as 999 to a 4-digit number.

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Add a number near to 1,000 by adjusting.

Once the technique for adding 9 to a number has been mastered, there is no problem with adding 19, 29 or 39!

Adding a single digit to a 3-digit number; there might well be plenty of counting on fingers here!

Mental addition and subtraction of multiples of 100, including crossing over the thousands.