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Collecting Like Terms MENU Single Variable (Adding) Harder mixed variables Single Variable (Adding questions) Harder mixed variables questions Single Variable (Adding & Subtracting) Teacher’s notes on quickfire questions Single Variable (Adding & Subtracting questions) Multiple variables (Adding) Adding single variables Adding & subtracting single variables Adding multiple variables Multiple variables (Adding questions) Multiple variables (Adding & subtracting) Multiple variables (Adding & subtracting) Questions Multiple variables Adding & subtracting multiple variables Multiple variables + & negative numbers Harder mixed variables (Adding & Subtracting : Negative numbers) Multiple variables (Questions) (Adding & Subtracting : Negative numbers) 1 Algebra MENU 2 Menu Traffic Jam x is the length of a single lorry. x x x + x x 4x ? + Lorry length + Lorry length + x x + Lorry length + x Lorry length = 4x Lorry lengths 3 Menu Traffic Jam c is the length of a single car. 2c 3c c + c 6c ? 2c + 3c 2 car lengths + 3 car lengths + 1 car length = 6 Car c lengths 4 Menu a is the cost of an apple Total Cost = ? 4a a Cost of 1 apple + a Cost of 1 apple + a Cost of 1 apple + a Cost of 1 apple = Cost of 4 apples = 4a 5 Menu a is the cost of an apple Total Cost = ? 6a 3a Cost of 3 apples + 2a Cost of 2 apples + a Cost of 1 apple = Cost of 6 apples = 6a 6 Menu 1 x +1x 3x + 5x 2x + 4x + 1x 3y + 6y 1 w +1 w + 4w is the same as : is the same as : 2x 8x 7x 9y 6w is the same as : is the same as : is the same as : 7 Menu Simplify the following expressions 4h 3x 1) x + x + x 2) h + h + h + h 7e 3) 2e + 5e 8y 4) 3y + y + 4y 5w 5) 3w + 2w 5g 6) 2g + 2g + g 21h 7) h + 2h + 3h + 4h + 5h + 6h 8 Menu Answers 9 Menu x is the length of a single lorry. 5x- 2x = 3x 3x 10 Menu c is the length of a single car. 3c + 4c - 5c = 2c 11 Menu a is the cost of an apple Total Cost = ? 3a 5a - 2a = 3a 12 Menu c is the cost of a cherry ? Total Cost = 6c 9c - 3c = 6c 13 Menu 2x - 1x 5x - 2x 7x - 3x - 2x 9f - f - 3f 8w + 2w - 3w 8g - g + 3g - 4g is the same as : x 3x 2x 5f 7w 6g is the same as : is the same as : is the same as : is the same as : is the same as : 14 Menu Simplify the following expressions 2h 3x 1) 5x - x - x 2) 7h - 2h - 3h e 6y 3) 8e - 7e 4) 7y + y - 2y 8w 11g 5) 9w - w 6) 8g - 2g + 5g 7a 7) 7a + a - 4a - 2a + 5a 15 Menu Answers 16 Menu x is the length of a single lorry. c is the length of a single car. 2x + 3x 3c + x + = 3x= +? 7c + 4c 7c 17 Menu x is the length of a single lorry. c is the length of a single car. x + 3c + 8 + 2x +c 8 metre gap = 3x + =4c? + 8 3x + 4c + 8 18 Menu x is the length of a single lorry. 2x + 5 + 2x + 3+ x 5 metre gap 3 metre gap = 5x = ?+ 8 + 5x 8 8 metre gap 19 Menu a is the cost of an apple p is the cost of a pear Total Cost = ? 3a + 2p a + a + a + p + Cost of Cost of Cost of Cost of + an apple +an apple +an apple + a pear p Cost of a pear = Cost of 3 apples + cost of 2 pears = 3a + 2p 20 Menu s is the cost of a strawberry c is the cost of a cherry Total Cost = ? 4s + 6c 2s + Cost of 2 strawberries 3c + Cost of 3 cherries 2s Cost of 2 strawberries + 3c Cost of 3 cherries = Cost of 4 strawberries + cost of 6 cherries = 4s + 6c 21 Menu s is the cost of a strawberry ?s + 10 Total Value = 6 4s + 10 + 2s Value of 4 strawberries 10 Value of 2 strawberries = Value of 6 strawberries + 10 = 6s + 10 22 Menu s is the cost of a strawberry c is the cost of a cherry Total Value = ? 4s + 3c + 30 Value of 2 strawberries + 10 + Value of 3 Value of 2 cherries strawberries + + 20 = Value of 4 strawberries + value of 3 cherries + 30 = 4s + 3c + 30 23 Menu + 2x + 4x + 3y + 2y is the same as : 6x + 5y + 3x + 5y + 6x + 7y is the same as : 9x + 12y 4w + 3h + w + 2w is the same as : 7w + 3h 3x + 5y + 2a + 4x + 4y + a 4a + 3a + 5 is the same as : 3x + 5 + 4x + 2 + 5y + 1 is the same as : 7x + 9y + 3a 7a + 5 is the same as : 7x + 5y + 8 The sign BEFORE the term belongs to the term ! 24 Menu Simplify the following expressions 10x + 5y 1) 4f + 5w 4x + 6x + 3y + 2y 2) 9h + 11c 3) 6g + 3t 7h + 3c + 2h + 8c 4) 9a + 6k 5) 8a + 4k + 2k + a 6) a+b+a+b 4x + 1 3x + 2 + 2x + 1 8) 5h + 5g + 7 9) 5g + g + 3t 2a + 2b 5x + 3 7) 4f + 3w + 2w x + 1 + x + 2x 9 + 2x + y 5h + 3g + 7 + 2g 10) 7+x+x+y+2 25 Menu Answers 26 Menu x is the length of a single lorry. c is the length of a single car. + 4x 3x 3x + c 3c - x - 2c +c 27 Menu a is the cost of an apple p is the cost of a pear 5a + 3p - 4a - p = a + 2p 28 Menu + 5x – 3x + 3y + 2y is the same as : 2x + 5y + 8x + 5y – 3x – 2y is the same as : 5x + 3y 4w + 3h – w – 2w is the same as : w + 3h 9x + 5y + 2a – 3x – 4y + a 7a – 3a + 5 is the same as : 8x + 5 – x – 2 + 5y + 1 is the same as : 6x + y + 3a 4a + 5 is the same as : 7x + 5y + 4 The sign BEFORE the term belongs to the term ! 29 Menu Simplify the following expressions 2x + 2y 1) 7a + 2b 7x + 2y – 5x 2) 2h + 3a 6c + t 3) 4c + 2c + 6t – 5t 4) 5g + 6w – g – 6w 6) f 7) 5 + 4f – 3f – 4 – 1 h + 4a + h – a 3x + 4 4g 5) 8a – a + 3b – b 4x + 7 – x – 2 – 1 7k + 3m 8) 5k + k + k + 4m – m 3a + 8b + 5 9) 10) 3a + 6b + 7 – a + 2b – 2 + a 3 + 4x + 6y 7 + x – 3 + 5y + 3x – y + 2y – 1 30 Menu Answers 31 Menu -4 -3 -2 -1 0 1 Subtract 2 3 4 Add 3x + 2y – 2x – 5y is the same as : x - 3y 2x + 4y – 5x – 8y is the same as : - 3x - 4y 4a – 2b – a – 2b is the same as : 3a - 4b 3h – 4r + h – 2r – 1 + r + 3 is the same as : 4h - 5r + 2 The sign BEFORE the term belongs to the term ! 32 Menu Simplify the following expressions 3a – 4b -x+y 1) 4x - 5x + 3y - 2y 2) 5g – 3y + 8 3) 5) 7) 2a – 3b – b + a 4g – 4w 6g – g + 8 – 3y 4) 3x – 4 3g + g – 3w – w 2a + 1 4x + 3 – x – 7 6) c 6c + 2 + 2c – 2 – 7c 8) 4t + 1 – 4t + 2a 6 – 3x – 4y 6 – 2x – 5y – x + y - 5h – 3 + 3f 9) 4h + 3 – h + 3f – 9h – 5 + h – 1 0 10) 1 – x + y – 2x – 2y – 1 + 3x + y 33 Menu Answers 34 Menu When adding or subtracting in order to simplify the expression the terms must be IDENTICAL to each other ! x2 + x2 + x is the same as : 2x2 + x ab + ab + a is the same as : 2ab + a xy + yx is the same as : 2xy or 2yx x × y is the same as y × x 8a + 4ab – 3a – b + 1 3x + 5xy – x + xy + 4 is the same as : 2x + 6xy + 4 is the same as : 5a + 4ab – b + 1 2 × 3 is the same as 3 × 2 6x2 – 5xy + x2 – yx + y is the same as : 7x2 – 6xy + y 35 Menu Simplify the following expressions fg – f 5xy + 3x 1) 4xy + 3x + xy 2) 4fg – f – 3fg 3) 5 + x + 5x – 2x2 4) 9a3 + 2a2 + a3 – a 5) 6km – 7 – 9km + mk – 1 + m2 5 + 6x – 2x2 - 2km – 8 + m2 10a3 + 2a2 – a 3abc 6) abc + cba + bca 7) 5wxy + 8w2xy – 5wxy – 8w2x 8) 7ax + 5 – 12xa + 3a – 4x + a – x 9) 4πr2 + 8πr2 + 4ad – 12ad + 5 10) 6πr + 9r – πr + πd – πr3 8w2xy – 8w2x - 5ax + 4a – 5x + 5 12πr2 – 8ad + 5 5πr + 9r + πd – πr3 36 Menu Answers Teacher’s Notes on quickfire questions Quickfire questions are designed as a straight forward starter where pupils quickly work out the answers (possibly in the backs of their books). The teacher should then review each question giving out the answers and reminding pupils of the techniques / ideas behind the topic. 37 Menu Menu 38 Question 1 Simplify : 2x + 3 + 2 Menu 39 Question 2 Simplify : 2x + 4x + 3 Menu 40 Question 3 Simplify : 3x + 2x + 1 + 4 Menu 41 Question 4 Simplify : 5x – 3x + 2y – 3 Menu 42 Question 5 Simplify : 8x + 3m – 2x – m Menu 43 Question 6 Simplify : 6x + y – 2x + 1 – 3y Menu 44 Question 7 Simplify : 2x – 1 – 4 + x Menu 45 Question 8 Simplify : 5x – 3 + x + 1 Menu 46 Question 9 Simplify : 4 + 2x – x + y Menu 47 Question 10 Simplify : 5 – 3x – 2x + 3 Menu 48 Menu 49 Question 1 2x + 4x Menu 50 Question 2 3x + 5x Menu 51 Question 3 x + 2x Menu 52 Question 4 2x + 3x + 4x Menu 53 Question 5 3x + x + x Menu 54 Question 6 2w + 4w + 2w Menu 55 Question 7 h + 2h + 3h Menu 56 Question 8 m + m + 4m Menu 57 Question 9 3y + 2y + y Menu 58 Question 10 c + 2c + 3c + 4c Menu 59 Menu 60 Question 1 5x – 2x Menu 61 Question 2 7x – 6x Menu 62 Question 3 8x – x Menu 63 Question 4 6x – 2x – 3x Menu 64 Question 5 8w + 3w – 2w Menu 65 Question 6 9y + 3y – 4y Menu 66 Question 7 12c – 8c + 3c Menu 67 Question 8 9h + 3h – 11h Menu 68 Question 9 8g + 2g – g – 3g Menu 69 Question 10 10e – 3e – 2e – 5e Menu 70 Menu 71 Question 1 5x + 2y + 3x Menu 72 Question 2 3x + x + 4y + y Menu 73 Question 3 5g + 4 + 2g + 1 Menu 74 Question 4 x+1+y+x Menu 75 Question 5 6x + 4x + y + 2y Menu 76 Question 6 3+x+y+2 Menu 77 Question 7 x+y+x+1 Menu 78 Question 8 4h + 3g + g + h Menu 79 Question 9 3+x+2+x Menu 80 Question 10 2e + e + 2e + f Menu 81 Menu 82 Question 1 3x + 2y – x – y Menu 83 Question 2 6x + 3x + 8y – 2y Menu 84 Question 3 8m + 3n – m – n Menu 85 Question 4 5h + 3 – h + 2 Menu 86 Question 5 8e + 4f + 3 – e – 3 Menu 87 Question 6 g + 2 + g + 3 – 2h Menu 88 Question 7 3p – p + 5 – 2q Menu 89 Question 8 12x – 5x – x + 1 – x Menu 90 Question 9 a+b–a+b–1 Menu 91 Question 10 5h + k – 5h + 2k Menu 92 Menu 93 Question 1 5ab + 3a + 4ab Menu 94 Question 2 2 x + Menu 2 x +x 95 Question 3 2 a + 3+ Menu 2 2a –1 96 Question 4 2 5m – 2 m Menu – 6a + a 97 Question 5 2ef + fe + 2 – 5ef Menu 98 Question 6 2 3ax + 4ax + Menu 2 xa 99 Question 7 2 2a +1– Menu 2 2 ab +3 100 Question 8 abc + cba – ab Menu 101 Question 9 3 2 ab + 3 2 2a b Menu – 3 a 102 Question 10 2 8πr + Menu 2 πr - πr 103 End of Collecting Like Terms Presentation. 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