Q: What happens to a numbers tens-place digit when you add ten?

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It is easier to simply add two one-digit numbers than to mess about with estimation!

From right to left.

they all are digit numbers

To make the list of two-digit numbers with digits that add up to 10, first write the pairs of single-digit integers that add up to 10. They are (1,9), (2,8), (3,7), (4,6), (5,5). Then recognize that each of these pairs of numbers, except 5, can be combined in two different ways to make two-digit numbers that satisfy the problem. 19 and 91 28 and 82 37 and 73 46 and 64 55 So there are nine two-digit numbers with digits that add up to 10.

You can add 3 numbers (or any quantity of numbers) and get a sum.

Related questions

You line up the last numbers and then add it!

When you add tens to the tens digit and ones it goes ten more.

To multiply two digit numbers, multiply each place value of a factor by each place value digit and add the results.

It is easier to simply add two one-digit numbers than to mess about with estimation!

Add the two greatest possible four digit numbers. 9999 + 9999

Idont know

21

From right to left.

they all are digit numbers

To make the list of two-digit numbers with digits that add up to 10, first write the pairs of single-digit integers that add up to 10. They are (1,9), (2,8), (3,7), (4,6), (5,5). Then recognize that each of these pairs of numbers, except 5, can be combined in two different ways to make two-digit numbers that satisfy the problem. 19 and 91 28 and 82 37 and 73 46 and 64 55 So there are nine two-digit numbers with digits that add up to 10.

You can add 3 numbers (or any quantity of numbers) and get a sum.

No. There's no two digit numbers that could do this. The largest two digit number is 99. If you add 99 to itself, you only get 198, which is much smaller than a four digit number.