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Subtracting fractions is easy when you have common denominators. Explain to students that when the denominators—or the bottom numbers—are the same in two fractions, they only need to subtract the numerators or top numbers. The five worksheets below give students plenty of practice subtracting fractions with common denominators.Each slide provides two printables. Students work the problems and write down their answers on the first printable in each slide. The second printable in each slide provides the answers to the problems to make grading easy. D. RussellPrint the PDF: Subtraction of Fractions With Common Denominators Worksheet No. 1 In this worksheet, students will subtract fractions with common denominators and reduce them to the smallest terms. For example, in one of the problems, students will answer the problem: 89 – 29. Since the common denominator is 9, students only need to subtract 2 from 8, which equals 6. They then place the 6 over the common denominator, yielding 69.They then reduce the fraction to its lowest terms, also known as the least common multiples. Since 3 goes into 6 twice and into 9 three times, the fraction reduces to 23. D. RussellPrint the PDF: Subtraction of Fractions With Common Denominators Worksheet No. 2This printable offers students more practice subtracting fractions with common denominators and reducing them to the smallest terms, or least common multiples. If students are struggling, review the concepts. Explain that the least common denominator and least common multiples are related. The least common multiple is the smallest positive whole number into which two numbers can be divided evenly. The least common denominator is the smallest least common multiple that the bottom number (denominator) of two given fractions share. D. RussellPrint the PDF: Subtraction of Fractions With Common Denominators Worksheet No. 3Before having students answer the problems on this printable, take the time work a problem or two for students as you demonstrate on the chalkboard or a piece of paper.For example, take an easy calculation, such as the first problem on this worksheet: 24 – 14. Explain again that the denominator is the number on the bottom of the fraction, which is 4 in this case. Explain to students that since you have a common denominator, they only need to subtract the second numerator from the first, or 2 minus 1, which equals 1. They then place the answer—called the difference in subtraction problems—over the common denominator yielding an answer of 14. D.RussellPrint the PDF: Subtraction of Fractions With Common Denominators Worksheet No. 4Let students know they are more than halfway through their lesson on subtracting fractions with common denominators. Remind them that in addition to subtracting the fractions, they need to reduce their answers to the lowest common terms, which are also called the least common multiples.For example, the first problem on this worksheet is 46 – 16. Students place 4 – 1 over the common denominator 6. Since 4 – 1 = 3, the initial answer is 36. However, 3 goes into 3 one time, and into 6 twice, so the final answer is 12. D. RussellPrint the PDF: Subtraction of Fractions With Common Denominators Worksheet No. 5Before students complete this final worksheet in the lesson, have one of them work out a problem on the chalkboard, whiteboard or on a piece of paper as you observe. For example, have a student answer problem No. 15: 58 – 18. The common denominator is 8, so subtracting the numerators 5 – 1 yields 48. Four goes into 4 one time and into 8 twice, yielding a final answer of 12. These fractions worksheets are great practice for beginning to subtract simple fractions. These fractions problems include visual representations (Pies) to aid the student in the subtraction. The fractions will have the same denominators and not equal zero. Click here for More Fractions Worksheets This fraction worksheet is great for practicing subtracting MixedNumbers Problems. You may select whether or not the problems require regrouping or not.The problems may be selected for five different degrees of difficulty. The easiest willkeep the denominators the same and the numerators between 1 and 9. The hardest will keepthe numerators between 1 and 20 and the common denominators under 120. The answer worksheetwill show the progression on how to solve the problems. First find the common denominatorand adjust the fractions. The next step is to regroup if needed. Then subtract the numeratorsand whole numbers. Then check to see if we need to simplify or reduce the mixed number.This fraction worksheet will generate 10 or 15 mixed number subtraction problems per worksheet,and remember every time you create a worksheet the problems will change and will not repeat. Click here for More Fractions Worksheets
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