© 2007, 2013 QUT YuMi Deadly Centre YUMI DEADLY CENTRE School of Curriculum Enquiries: +61 7 3138 0035 Email: ydc@qut.edu.au http://ydc.qut.edu.au 99 Boards Additive Subtraction YuMi Deadly Maths Past Project Resource Restricted waiver of copyright This work is subject to a restricted waiver of copyright to allow copies to be made for educational purposes only, subject to the following conditions: All copies shall be made without alteration or abridgement and must retain acknowledgement of the copyright. The work must not be copied for the purposes of sale or hire or otherwise be used to derive revenue. The restricted waiver of copyright is not transferable and may be withdrawn if any of these conditions are breached. © 2007, 2013 QUT YuMi Deadly Centre
© 2007, 2013 QUT YuMi Deadly Centre 99 Board Additive Subtraction These are predominantly templates, giving one or two examples for each type of activity. They can be duplicated and used to work with students in developing and consolidating understanding of the relevant concepts. HOW TO USE THIS MATERIAL: Do not use this material in slide show, it will not work. Right click, and select “End Show” to exit slide show. For further details of how to use this material, please refer to Basic Maths Booklet VB2: Mathematics behind Whole-Number Numeration and Operations. © 2007, 2013 QUT YuMi Deadly Centre
One example with answers One blank example Additive subtraction using sequencing Fill the distance with 10s then 1s One example with answers One blank example © 2007, 2013 QUT YuMi Deadly Centre
© 2007, 2013 QUT YuMi Deadly Centre 53 + = 74 21 Example 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 1 1 1 1 1 1 10 10 10 10 Place the circle on the first number. Place the hexagon on the answer. Use the arrows to fill the distance between the two numbers. Add up the arrows and type the answer in the box. 10 10 1 © 2007, 2013 QUT YuMi Deadly Centre
© 2007, 2013 QUT YuMi Deadly Centre 34 + = 56 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 1 1 1 1 1 1 10 10 10 10 10 Place the circle on the first number. Place the hexagon on the answer. Use the arrows to fill the distance between the two numbers. Add up the arrows and type the answer in the box. © 2007, 2013 QUT YuMi Deadly Centre
© 2007, 2013 QUT YuMi Deadly Centre Additive subtraction using compensation Overfill the distance with 10s then take away 1s One example with answers One blank example © 2007, 2013 QUT YuMi Deadly Centre
© 2007, 2013 QUT YuMi Deadly Centre 46 + = 65 Example 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 -1 -1 -1 -1 -1 10 10 10 10 10 10 Place the circle on the first number. Place the hexagon on the answer. Use the arrows to fill the distance between the two numbers. Add up the arrows and type the answer in the box. 10 -1 10 © 2007, 2013 QUT YuMi Deadly Centre
© 2007, 2013 QUT YuMi Deadly Centre 25 + = 53 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 -1 -1 -1 -1 -1 10 10 10 10 10 10 Place the circle on the first number. Place the hexagon on the answer. Use the arrows to fill the distance between the two numbers. Add up the arrows and type the answer in the box. © 2007, 2013 QUT YuMi Deadly Centre