What Is Near Doubles In 2nd Grade Math, And "Make A Ten"?

The 'Make A Ten' Strategy is a simple yet effective, easy to remember system for working out multiplication in mental arithmetic circumstance. We will give a brief detailing below (and it will be brief, as it's so easy to do!), using the sum '89 + 24' -

First, you must change one number to a multiple of ten. 89 is the number already closest to a multiple of ten, so we will add 1 to it to make it to 90.

Now you must adjust the other number in the OPPOSITE manner. Because we added 1 to 89, we must SUBTRACT 1 from 24, to make it 23.

Now, it is much easier to work out 90 + 24, than it is to work out 89 + 24.

The answer to both of these sums is 113.

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"Near doubles" are 2 consecutive numbers. For example: 2 and 3, 7 and 8, 11 and 12.  Therefore, 4 + 5 are near doubles.
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'Near doubles' are simply numbers that are nearly the same as another. For example, 3 and 4 are  'near doubles' because 3 is nearly a double of 4!
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