Homework Unlocked offers homework help to parents to explain how to regroup numbers in multiplication and the difference between carrying and regrouping.
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Carrying/Regrouping Numbers in Multiplication
In multiplication, you will need to carry/regroup a number whenever the value of the product is greater than nine. Today, many teachers are using the term regrouping, rather than carrying. Don’t let this trip you up- it is the same concept!
Step 1: Stack the numbers so the larger is on top, aligning the numbers according to place value. (Tip: for more information, please see the Homework Unlocked video “Finding Place Value“.)
Step 2: Multiply the smaller number by each number in the larger number
For example, a problem such as 18 x 6 would require us to “carry” the 4 from the ones place (because 8 x 6 = 48) to the tens place. Since this numeral 4 really represents the number 40, it’s more appropriate to say we are regrouping it by representing those forty ones, as four tens.
Example: 18 x 6
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