Let's look at rounding 44 to the nearest 10. First put 44 on the number line, then add the closest multiples of ten. 40 and 50 are the closest multiples of ten to 44. 44 is 4 away from 40 and 6 ...

Complete this quiz to understand how to add up to 4-digit numbers together. Then put your knowledge to the test. If the two numbers in a place value column add up to ten or more, you must regroup.