1. Use the and circle the number you begin with (minuend) on the number chart. Use the tool to put the counter on that number to begin 2. Use the tool to build the number you're subtracting (subtrahend). 3. Use the tool to move the counter according to the tens and ones in that number. 4. Use the or to complete the number sentence.
Pages 1-3 add up to 100 Pages 4-6 add up to 120 Pages 7-9 add up to 200