4.NBT.4 Fluently add and subtract multi-digit whole numbers using the standard algorithm.4.OA.3 Solve multi step word problems posed with whole number and having whole number answers using the four operations...Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.
During this unit, we will be learning to add and subtract 7 digit whole numbers with regrouping and without regrouping.
Regrouping simply means that when you are adding you will need to carry over a number. Regrouping in subtraction is when you have to borrow.
The following are videos that demonstrates adding with regrouping and subtraction with regrouping.
Addition - sum of two addends
Subtraction - operation on two numbers that tells the difference
Sum - answer to an addition problem
Difference - answer to a subtraction problem
Addend - numbers being added together
Subtrahend - the amount being subtractedMinuend - the first number in a subtraction sentence (the whole)Commutative Property of Addition – the order in which numbers are added does not change the sum. Example: 6+4+3=13, 4+3+6=13Associative Property of Addition – the way in which numbers are grouped when added does not change the sum. Example: (6+3)+2=11, 6+(3+2)=11Identity Property of Addition – the sum of any number and 0 is the number. Example: 5+0=5, 11+0=11Inverse Operation - the opposite of something. Example addition is the inverse operation of subtractionVocabulary Practice; http://quizlet.com/149430388/addition-and-subtraction-vocabulary-flash-cards/Websites:
I have listed several websites below that will be helpful to you during this unit. Some of the websites have online games, others have worksheets that may help you practice with these skills. Feel free to use as much or as little as you'd like.