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Regrouping is when say you have 24 cookies your mom ate 15 of them so that would be 24-15 well 4-5 that wouldn't work so the 1s group goes
to the 10s group and asks for a 10 so 4+10=14. And 15-5 =10 and
24-15=10 so 24-15=10

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Regrouping is when say you have 2-3 you can not so the 1s go to the 10s and say can I have a 10 so the 2 terns in to a 12 so 12-3=9

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Say if you had 10 cookies you  ate 5 now you have 5 cookies  10-5=5

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When you have 7+2=9 like this
7+ 2 =9   2+2=4 5+5= 10.

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If you have 11-44 you can't do that because you have 11-44 the 11 is smaller then the bigger number so you regroup and steel a ten from you're. Neighbor

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Subtracting say you have 10 cookies and you take away twelve but you can't do that you have to cross out the the ten and put a nine in the tens
colem.And then you have to add them up and it will exwill

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Regrouping.

Say you have 64-45 well you can't take away 4 from 5 so you ask from the 10s so you make 4 magically turns into a 14 and then you can do the answer. The answer is 29

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Regrouping is when you have say 64 -45 well 4 can't take away 5 right so the ones collom asks the tens collom and the ones collom says to the tens collom "hey can I have a ten "and the tens collom says" yeah sure ".So the ones collom takes a ten so then the 4 from the tens collom terns into a 3 and then the 4 terns into 14.And 14 take away 5 =9. And 6 take away 4 is 2 .So all together it makes 29.

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In subtraction say your question is
43
-25
You Cannot take 3 away from 5. So you have to steal one ten.That makes the three into thirteen and thirteen minus five is 8. And 3-2 is one. That means The awnser is 18. Sorry if you didn't understand. I am the worst at math ever.

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Say you had 47-78    You can't take8 away from seven so you got to regroup you got to ask the ten Collum can I have a ten and the ten collum says yes so 7 becomes 17 and 8 can take away 17 it equals 9 than 3 can take away 7 and it equals 49.

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Say you had 10 ice cream you ate 5 you'd have 5 ice cream

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if you have 1200  then take away 600 then you have 600 left lol

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Subtracting say you have 10 crackers take away 8 is 2 that is subtracting .

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5+5=10. 10+1=11. 2+5=7.5+0=5.100+400=500.500+500=1000.1000+1000=2000.2000+3000=5000 .5000+5000=01000.2000+1000. =3000.7000+1000=8000

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Say if you have the number 567you want to add  123 would show it like this. since you can not have a ten in the ones colom you take the one and put it into the tens colom.then you would add it to the tens colom.then after you would add the hundreds and you have got the answer 690.

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Say you have 562 + 359, you'd go over to the 1's coulm and add 9+2, which would be 11. You can't have 11 in the 1's coulm, so you put the 10 in the 10's coulm. Now you have 6+5+1, which is 12. So you put the 10 in the 100's coulm. Now you need to add 5+3+1, which is 9. So the answer is 921.

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Say you have 25-43 you can't do 3-5 so you take a ten from 40 then put the ten into the 3 then it would be 13 and 13-5 is 8 and 3-2 is 1 and that  is 18

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Regrouping in sustration .if you have 88 people-99 you can't take away 88 with 99 so you regroup you take ten from the tens column & take a ten & add it to the ones collum so the ones collum turns into 188 then add it 188 people-99 subtract it 188 people-88 people the answer is 81. this is a defrent eqasion with regroping in sutration 55 sutract 88you have 55 you cant take it away so you regroup you take a ten from the tens cllum then add it to the ones collum then the ones collum terns into 155.then you take 88 off of 155 so you sutract it 155 take away 88 it eqwals 73 that is the answer.

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If you have 37
Plus 48 you Need to regroup.if any number is over 9 you need to regroup.if you had 8 plus 7 it is over 9 so you have to regroup 8 plus 7 is 15.15 can't go in the ones . That ten go's in the ten group . that  equas 85

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You have 10cookies
You ate 01cookies
You have to regroup
You can't mines 2 form1
you take a ten and put it on the ones spot
Then you can mines.