3. Subtraction 1


Look Back 1. Cross out the correct number to get the answer.


9 – 3 = 6


11 – 4 = 12 – 6 = 8 – 2 =


15 – 8 = 1 23 4 56789 10 11 12 13 14 15 16 17 18 19 20


2. 17 – 4 = 13 13 – 3 = 16 – 8 = 15 – 9 = 20 – 8 = 18 – 10 = 12 – 3 = 15 – 8 =


Strand: Number


Curriculum Objectives: Develop an understanding of subtraction as deducting, as complementing and as difference; develop and recall mental strategies for subtraction 0–20;


16 – 6 = 10 – 5 = 11 – 5 = 12 – 7 = 14 – 2 = 11 – 6 = 13 – 8 = 13 – 9 =


11 – 8 = 9 – 6 = 8 – 1 =


13 – 5 = 17 – 4 = 10 – 1 = 14 – 8 = 17 – 3 =


19 – 7 = 12 – 4 = 17 – 9 = 19 – 6 = 16 – 7 = 17 – 5 = 20 – 10 = 16 – 9 =


construct number sentences involving subtraction of whole numbers; solve problems involving subtraction; estimate differences within 99; subtract numbers without and with renaming within 99; use the symbols +, –, =, <, >; solve one-step and two-step problems involving subtraction.


17


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