Mathematics Grade 4 15 min

Convert decimals to fractions and mixed numbers

Convert decimals to fractions and mixed numbers

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Introduction & Learning Objectives

Learning Objectives Identify the place value of digits in tenths and hundredths. Convert a decimal with one decimal place into a fraction with a denominator of 10. Convert a decimal with two decimal places into a fraction with a denominator of 100. Simplify fractions by dividing the numerator and denominator by a common factor. Convert a decimal greater than 1 into a mixed number. Explain that decimals and fractions are different ways to represent parts of a whole. Have you ever seen a price like $2.50 and wondered how to write that 50 cents as a fraction of a dollar? 🪙 Let's find out! In this lesson, we will discover how decimals and fractions are like secret twins that represent the same value. Learning to change a decimal into a fraction will help us understand num...
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Key Concepts & Vocabulary

TermDefinitionExample DecimalA number that uses a decimal point to show a value that is a part of a whole number. It's another way to write a fraction.0.5 is a decimal that means one-half. FractionA number that shows a part of a whole. It has a top number (numerator) and a bottom number (denominator).1/2 is a fraction that means one-half. Mixed NumberA number made up of a whole number and a fraction.3 1/2 is a mixed number. Tenths PlaceThe first place value to the right of the decimal point. It represents parts out of 10.In the decimal 0.4, the 4 is in the tenths place. Hundredths PlaceThe second place value to the right of the decimal point. It represents parts out of 100.In the decimal 0.65, the 5 is in the hundredths place. SimplifyTo reduce a fraction to its smallest, or simplest...
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Core Formulas

Tenths Conversion Rule 0.a = \frac{a}{10} If a decimal has one digit after the decimal point (in the tenths place), write that digit as the numerator over a denominator of 10. Hundredths Conversion Rule 0.ab = \frac{ab}{100} If a decimal has two digits after the decimal point (in the hundredths place), write those digits as the numerator over a denominator of 100. Mixed Number Conversion Rule W.ab = W \frac{ab}{100} For a decimal greater than 1, the number to the left of the decimal point is the whole number. Convert the part to the right of the decimal point into a fraction.

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Sample Practice Questions

Challenging
Convert the decimal 0.64 to a fraction in its simplest form.
A.16/25
B.64/100
C.32/50
D.6/4
Challenging
The decimal 5.__ is equal to the mixed number 5 2/5. What digit goes in the blank space?
A.2
B.4
C.5
D.8
Challenging
Why can both 0.7 and 0.70 be correctly written as the simplified fraction 7/10?
A.Because 7 and 70 are both factors of 10.
B.Because you can always remove the last digit of a decimal.
C.Because 7/10 and 70/100 are equivalent fractions.
D.Because the zero in 0.70 is not in a place value position.

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