By Lucille Caron

ISBN-10: 0766014320

ISBN-13: 9780766014329

Publication by way of Caron, Lucille, St Jacques, Philip M.

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**Extra resources for Addition and Subtraction (Math Success)**

**Sample text**

2. Subtract fractions from fractions and whole numbers from whole numbers. Subtract 4 ᎏ1ᎏ Ϫ 2 ᎏ1ᎏ 2 3 Step 1: Find the least common denominator (LCD). multiples of 2: 2, 4, 6, 8, . . multiples of 3: 3, 6, 9, 12, . . LCD = 6 Step 2: Find equivalent fractions using the LCD. Step 3: Subtract fractions. Subtract whole numbers. 1ϫ3 ᎏᎏ 2ϫ3 1ϫ2 2 ϭ ᎏ3ᎏ, ᎏ ᎏ ϭ ᎏᎏ 6 3ϫ2 4 ᎏ3ᎏ 6 Ϫ2 ᎏ2ᎏ 6 2 ᎏ1ᎏ difference 6 equivalent fractions—Fractions with equal values. mixed number—A whole number and a fraction. 60 6 Subtracting Mixed Numbers with Regrouping Sometimes the fraction in the first number is smaller than the fraction in the second number.

When a number is subtracted from itself, the difference is zero. 0 1 2 3 4 5 6 7 8 9 Ϫ0 Ϫ1 Ϫ2 Ϫ3 Ϫ4 Ϫ5 Ϫ6 Ϫ7 Ϫ8 Ϫ9 0 0 0 0 0 0 0 0 0 0 When zero is subtracted from a number, the difference is that number. 1 Ϫ0 1 2 Ϫ0 2 3 Ϫ0 3 4 Ϫ0 4 5 Ϫ0 5 6 Ϫ0 6 7 Ϫ0 7 8 Ϫ0 8 9 Ϫ0 9 When a number that is one less than a given number is subtracted, the difference is one. 2 Ϫ1 1 3 Ϫ2 1 4 Ϫ3 1 5 Ϫ4 1 6 Ϫ5 1 7 Ϫ6 1 8 Ϫ7 1 9 Ϫ8 1 When a number that is two less than a given number is subtracted, the difference is two.

3, 6, 9, 12, 15, . . LCD ϭ 12 Placing the least common multiple in the denominator of two fractions makes it the LCD. 3 ? 3ϫ3 9 Step 2: Write equivalent fractions ᎏᎏ ϭ ᎏᎏ ϭ ᎏᎏ ϭ ᎏᎏ 4 12 12 12 using the LCD. How many 4s are there in 12? (3). Multiply numerator by 3 (3 ϫ 3 ϭ 9). 2 2ϫ4 ? 8 How many 3s are there in ᎏᎏ ϭ ᎏᎏ ϭ ᎏᎏ ϭ ᎏᎏ 3 12 12 12 12? (4) Multiply numerator by 4 (2 ϫ 4 ϭ 8). Step 3: Subtract. 9 ᎏᎏ 12 9Ϫ8 1 Ϫ ᎏ8ᎏ ϭ ᎏ ᎏ ϭ ᎏᎏ 12 12 12 With a friend, list all the places where you see fractions.

### Addition and Subtraction (Math Success) by Lucille Caron

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