Adding & Subtracting Integers
Mathematics, Grade 8
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– 5 – 4 – 3 – 2 – 1 – 10 – 9 – 8 – 7 – 6 5 4 3 2 1 10 9 8 6 0 7 – 5 – 4 – 3 – 2 – 1 – 10 – 9 – 8 – 7 – 6 5 4 3 2 1 10 9 8 6 0 7 – 5 – 4 – 3 – 2 – 1 – 10 – 9 – 8 – 7 – 6 5 4 3 2 1 10 9 8 6 0 7 – 5 – 4 – 3 – 2 – 1 – 10 – 9 – 8 – 7 – 6 5 4 3 2 1 10 9 8 6 0 7 – 5 – 4 – 3 – 2 – 1 – 10 – 9 – 8 – 7 – 6 5 4 3 2 1 10 9 8 6 0 7 • To add a positive integer, start at zero and move right on the number line, and move left to add a negative integer. move right 5 spaces from zero and then 2 more = 1 = 0 + = – 1 – 5 – 4 – 3 – 2 – 1 – 10 – 9 – 8 – 7 – 6 5 4 3 2 1 10 9 8 6 0 7 • To subtract a positive integer, move left on the number line, and right to subtract a negative number. 7 days 1 week (wk) 5 + 2 5 + 2 = 7 blue move right 4 spaces from zero and then left 6 move left 3 spaces from zero and then 7 more -3 + (-7) 4 + (-6) -3 + -7 = -10 4 + (-6) = -2 red red red red red red red red red red red red red red red red blue red red move right 5 spaces from zero and then left 3 5 – 3 5 – 3 = 2 blue blue blue blue blue blue blue move left 7 spaces from zero and then left 2 move left 6 spaces from zero and then right 4 -7 – 2 blue red red +2 5 4 -3 -6 5 – (-4) -3 -2 -7 -6 + (-7) blue blue blue -7 – 2 = - 9 7 -6 – (-4) = -2 -6 – (-4) red red red red red red red red red red red red red blue blue blue blue blue blue blue Adding Integers on a Number Line Subtracting Integers on a Number Line © Copyright NewPath Learning. All Rights Reserved. 93-4605 www.newpathlearning.com Adding & Subtracting Integers
• To add a positive integer, start at and move on the number line, and move to add a integer. move spaces from zero and then more = 1 = 0 + = – 1 – 5 – 4 – 3 – 2 – 1 – 10 – 9 – 8 – 7 – 6 5 4 3 2 1 10 9 8 6 0 7 – 5 – 4 – 3 – 2 – 1 – 10 – 9 – 8 – 7 – 6 5 4 3 2 1 10 9 8 6 0 7 – 5 – 4 – 3 – 2 – 1 – 10 – 9 – 8 – 7 – 6 5 4 3 2 1 10 9 8 6 0 7 – 5 – 4 – 3 – 2 – 1 – 10 – 9 – 8 – 7 – 6 5 4 3 2 1 10 9 8 6 0 7 – 5 – 4 – 3 – 2 – 1 – 10 – 9 – 8 – 7 – 6 5 4 3 2 1 10 9 8 6 0 7 – 5 – 4 – 3 – 2 – 1 – 10 – 9 – 8 – 7 – 6 5 4 3 2 1 10 9 8 6 0 7 • To subtract a positive integer, move on the number line, and to subtract a number. 5 + 2 5 + 2 = 7 blue -3 + (-7) 4 + (-6) -3 + -7 = -10 4 + (-6) = -2 red red red red red red red red red red red red red red red red blue red red 5 – 3 5 – 3 = 2 blue blue blue blue blue blue blue -7 – 2 blue red red blue blue blue -7 – 2 = - 9 7 -6 – (-4) = -2 -6 – (-4) red red red red red red red red red red red red red blue blue blue blue blue blue blue Adding Integers on a Number Line Subtracting Integers on a Number Line move spaces from zero and then more move spaces from zero and then move spaces from zero and then move spaces from zero and then move spaces from zero and then Key Vocabulary Terms • negative integer • number line • positive integer © Copyright NewPath Learning. All Rights Reserved. 93-4605 www.newpathlearning.com Adding & Subtracting Integers \|xiBAHBDy01663sz\
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