Adding Subtracting Decimals

Adding and Subtracting Decimals

Explode The Adding and Subtracting Decimals With These Proven Math Techniques!

If you want to find out why you haven’t been able to get the results that you want in learning adding and subtracting decimals in math, then this math lesson is perhaps the most critical piece of reading to learn about the decimals.

The decimal numbering system uses ten symbols called digits, each digit representing a number in math.

These symbols are 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9. The symbols are known as the numbers zero, one, two, three, etc.

By using combinations of 10 symbols, an infinite amount of numbers can be created in math.

Decimal fractions are commonly expressed without a denominator, the decimal separator being inserted into the numerator (with leading zeros added if needed), at the position from the right corresponding to the power of ten of the denominator in math.

e.g., 8/10, 83/100, 83/1000, and 8/10000 are expressed as: 0.8, 0.83, 0.083, and 0.0008.

Adding and Subtracting Decimals

First uses a place-value chart to guide kids to learn decimal place value up to thousandths.

Kids are required to complete the chart.
• Reminder: 5 = 5.0 = 5.00 = 5.000

Then shows a number sentence to kids.

• It is important to emphasizes that mixed operation involving addition and
subtraction of decimals, calculation must be done from left to right.
• Guides kids to find the answer using the place-value chart.

Kids write those numbers according to its place value.
• Kids fill in the empty spaces with zeros.
• Then guides kids to regroup when necessary.
• Next provides each pupil with a template of place-value chart.
• Show another number sentence and ask them to solve using a place value chart template given.

Kids place the decimal numbers given in the template before adding and subtract them.

However, decimals are added and subtracted in the same way as whole numbers, but you have to be careful to keep the decimal points lined up.

For example:

To add: .603 + 1.09, we must line up the decimal points.

To subtract: 9.6241 – .012, we would line up the decimal points.

We may place zeros after the last number in a decimal without changing its value.
The value of a decimal is not changed when we place zeros after the last number in the decimal.

If we place a zero after the “4″ in .64 and make it .640, the value of the decimal has no changed.

Since placing zeros after the last number in a decimal does not change its value, we may use these zeros to make our addition or subtraction example clearer:

Tips: Using zeros is most helpful when adding long columns of decimals.

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Check For More Decimals Lesson, Worksheets At Kids Math Blog Here.