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Earn +20 ptsQ: What one digit numbers can you add to 15 without needing to regroup?
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Continue Learning about Math & Arithmetic
How many 3 digit numbers can be formed from 5 numbers without repeating?
6
What is the lowest 5 digit number using even numbers without repeating any digit?
24680
When you you multiply when do you need to regroup?
You need to regroup when you add the numbers together and they add up to a number that is ten or more. For example: 1 164 +518 _____ 682 If it is over ten, take the first digit of the number and put it above the next number. Then, add that number onto the sum of the other digits underneath it.
How many 4 digit numbers can you make without repeating?
5040
What regroup mean in subtraction?
Regrouping in subtraction means that if you can't subtract because the digit on the bottom has a greater value than the digit on the top (such as 3-6), you have to "regroup" and subtract on from the top digit to the left of the digits your working with and then add a ten to the top digit your working with. Finally, you subtract. (645-9=630+15-9) Hope that makes sense!
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