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Warm-Up Create equivalent fractions for the following fractions.
1.) 2 3 7 2.) 7 3.) 18
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Learning Target I can add and subtract mixed fractions with unlike denominators. NF.A.1 How do our previous lessons relate to our learning target? Predict where/when/how we will use each skill today.
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Our Goal 3 2 - 1 1 What is the difference? 3 6 A.) 2 1/6 B.) 2 1/3
A.) 2 1/6 B.) 2 1/3 C.) 2 1/2 D.) 4 5/6
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Adding and Subtracting Mixed Numbers
v Check this out! Our first step is to change both mixed numbers into improper fractions. 2 π π +1 π π Whole number Γ the denominator + the numerator over the old denominator. = ππ π + π π Next, we need to find the LCD. The LCD is 10.
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Adding and Subtracting Mixed Numbers
v Once we create common denominators, weβll be ready to add. ππ π + π π ππ Γ π π Γ π + π Γ π π Γ π = ππ ππ + ππ ππ = ππ ππ Donβt forget to turn the improper fraction back to a mixed number! =3 π ππ
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Adding and Subtracting Mixed Numbers
v Thatβs not so bad! The only difference is changing the mixed numbers to improper fractions before you add or subtract. So, I like a little drama with my math! Well, letβs do one more just to make sure you have it! So you panicked for nothing! v
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Adding and Subtracting Mixed Numbers
v Letβs try this one! First, change the mixed numbers to improper fractions. 2 π π β1 π π = ππ π β π π Next, find the LCD. 8: 8, 16, 24, 32,β¦ The LCD is 24. 6: 6, 12, 18, 24,β¦
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Adding and Subtracting Mixed Numbers
v ππ π β π π Create common denominators! ππ Γ π π Γ π β π Γ π π Γ π = ππ ππ β ππ ππ = ππ ππ Change back to a mixed number! ππ Γ· π ππ Γ· π = Simplify! π π =1 π π
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Add or subtract the following mixed numbers.
Time to Show Your Stuff! v Add or subtract the following mixed numbers. 1)2 π π +1 π π 2)3 π π β π π =2 π π =4 3)2 π π +2 π π =4 ππ ππ 4)2 π π β1 π π = ππ ππ Let me guessβ¦practice time? You guessed right!
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If you agree, say βReady to Rollβ. If you disagree, drop the mic.
Evaluate Me I added the following fractions. Do you agree or disagree with my response? Justify your reasoning. = 2 3 If you agree, say βReady to Rollβ. If you disagree, drop the mic.
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Exit Ticket 3 2 - 1 1 What is the difference? 3 6 A.) 2 1/6 B.) 2 1/3
A.) 2 1/6 B.) 2 1/3 C.) 2 1/2 D.) 4 5/6
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