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This elementary school math tutorial from NutshellMath offers introductory homework help on adding and subtracting whole numbers with four digits. Whole numbers with four digits have four place values: ones, tens, hundreds and thousands. The most important thing to remember when adding and subtracting whole numbers with four digits is to line up the place values correctly. With whole numbers, the ones place will always be the one all the way to the right. If the ones places in two numbers are lined up, then the other places will be too.
To add whole numbers, begin at the right and add to the left. If two numbers in a place value column add to more than 10, remember to carry the one to the next column to the left. For subtraction, begin at the right as well, and subtract to the left. If the number on the top of a place value column is smaller than the one of the bottom, it is necessary to “borrow” from the next column to the left. To do so, make the column to the left less by one, and the “borrowing” column greater by 10.
This tutorial also offers examples on how to set up addition and subtraction problems from word problems. For word problems, it is often useful to estimate the answer first, so that you can check your final answer to make sure it is close to your estimate.
Addition and subtraction are fundamental operations in mathematics, and learning to add and subtract numbers of any size is a very valuable skill. This tutorial on adding and subtracting whole numbers will reinforce the basics of addition, subtraction, and place value.
This elementary school math tutorial from NutshellMath offers introductory homework help on adding and subtracting whole numbers with four digits. Whole numbers with four digits have four place values: ones, tens, hundreds and thousands. The most important thing to remember when adding and subtracting whole numbers with four digits is to line up the place values correctly. With whole numbers, the ones place will always be the one all the way to the right. If the ones places in two numbers are lined up, then the other places will be too.
To add whole numbers, begin at the right and add to the left. If two numbers in a place value column add to more than 10, remember to carry the one to the next column to the left. For subtraction, begin at the right as well, and subtract to the left. If the number on the top of a place value column is smaller than the one of the bottom, it is necessary to “borrow” from the next column to the left. To do so, make the column to the left less by one, and the “borrowing” column greater by 10.
This tutorial also offers examples on how to set up addition and subtraction problems from word problems. For word problems, it is often useful to estimate the answer first, so that you can check your final answer to make sure it is close to your estimate.
Addition and subtraction are fundamental operations in mathematics, and learning to add and subtract numbers of any size is a very valuable skill. This tutorial on adding and subtracting whole numbers will reinforce the basics of addition, subtraction, and place value.