15. Addition 3


Adding Numbers 1 23 4 567


C 8 11 C 12 C 13 C 14 C 15 C 16 C 36 C 37 C 9 C 10 C C 17 18 19 20


21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 C 42


C 38 C 40 C 39 41 C 43 C 44 C C 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 99 100


1. What is 10 more than 19? What is 10 more than 32? What is 10 more than 28?


Do you notice anything when you add 10 to a number?


2. 5 + 10 = 15 + 10 = 25 + 10 = 35 + 10 =


3. 12 + 10 = 22 + 10 = 32 + 10 = 42 + 10 =


Strand: Number 54


Curriculum Objectives: Develop an understanding of addition by combining or partitioning sets; develop and recall mental strategies for addition facts within 20;


8 + 10 = 18 + 10 = 28 + 10 = 38 + 10 =


14 + 10 = 24 + 10 = 34 + 10 = 44 + 10 =


3 + 10 = 13 + 10 = 23 + 10 = 33 + 10 =


17 + 10 = 27 + 10 = 37 + 10 = 47 + 10 =


6 + 10 = 16 + 10 = 26 + 10 = 36 + 10 =


11 + 10 = 21 + 10 = 31 + 10 = 41 + 10 =


explore, develop and apply the commutative properties of addition; add numbers without and with renaming within 99; explore and discuss repeated addition and group counting; construct number sentences and number stories; solve problems involving addition within 99.


7 + 10 = 17 35 + 10 = 45


Look at what happens when we add on 10.


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