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Name 1-2 Add. 1. 2+6= 2. 8 + 7 = 15 8 5+1= 8+1= 6 9 7 + 5 = 12 8 + 8 = 16 6 4-2= 2 8-1= 7 4 16 - 9 = 7 15 - 8 = 7 Subtract. 3. 9-3= 4. 12 - 8= 5. Write two equations for each Math Mountain. Equations may vary. 14 13 9 7+5= 14 - 9 = = 5+7 9+ = 6 6+ 4 = 8 + 8- = 3 8-3= UNIT 1 LESSON 2 13 13 - 6 = 14 8 6. Stretch Your Thinking Write four equations for this Math Mountain. 3+ = 3=8 3 Relate Addition and Subtraction © Houghton Mifflin Harcourt Publishing Company 5 7