Integer Operations

Add and Subtract Integers What are the rules to adding and subtracting integers? Different Signs or Same Signs? Sort the expressions. Click each expression and pick the correct category. Same sign add and keep -4 + -9 23 + 67 -14 + -16 Different signs subtract -9 + 4 25 + -14 -5 + 20 Can you solve? Solve the following adding integer problems. -19 + -3 -22 -5 + 20 15 5 + 3 8 -4 + -9 -13 -18 + 33 15 23 + 67 90 25 + -14 11 -14 + -16 -30 3 + -7 -4 -9 + 4 -5 Subtracting Integers The Easy Way! Do you remember how to subtract integers? KEEP CHANGE OPPOSITE Which expressions are equivalent? Match the expressions that are equivalent. Remember - keep, change, change -4 - 6 -4 + -6 9 - (-12) 9 + 12 25 - 32 25 + -32 -22 - (-2) -22 + 2 -4 - 6 = -10 2 10 -2 9 - (-12) = -21 3 21 -3 -13 - (-14) = -1 1 27 -27 25 - 32 = -7 57 7 -57 37 - (-7) = -44 -30 30 44 -22 - (-2) = 24 -20 20 -24 -55 - 15 = 70 -40 40 -70 Multiplying Dividing Integers Song What's the sign when you multiply or divide? Will your answer be positive or negative? Sort the expressions to either a positive answer or negative answer. Positive Answer 4 x 5 -14 x -10 -13 x -4 -22 ÷ -2 -50 ÷ -10 Negative Answer 20 x -12 4 x -13 22 ÷ -2 -35 ÷ 7 50 ÷ -10 Can you multiply and divide? Pick the correct answer fro each expression. 4 x 5 = 20 20 x -12 = -240 14 x -10 = -140 -13 x -4 = 52 -35 ÷ 7 = -5 -22 ÷ -2 = 11 50 ÷ -10 = -5 -12 ÷ -6 = 2 -35 ÷ -7 5 -20 x -12 = 240 -4 x 5 = -20 14 x 10 = 140 -13 x 4 = -52