1. Click your or arrow keys to move the card ahead! For your IPAD swipe the screen. Using Your Abacards ® Click and follow along using your abacus. After each click say what you saw. Practice saying what you will see before you click! After using the Abacards ®, make up problems. Forward Backward

2. 1 2 3 Adding Counting Numbers 1+2+3 Make a perfect rectangle by adding the same number of abacus beads without moving the original beads. Now you have 2 x the beads you started with! 4 4 4 We now have 3 rows of 4 and 3x4 = 12. We now take back ½ of 12 and get 6 as the sum of 1+ 2+ 3. Does that method work again?

3. 1 2 3 Adding Counting Numbers 1+2+3+4 Make a perfect rectangle by adding the same number of abacus beads without moving the original beads. Now you have 2 x the beads you started with! 5 5 5 We now have 4 rows of 5 and 4x5 = 20. We now take back ½ of 20 and get 10 as the sum of 1+ 2+ 3 + 4. Does this method work again? 4 5

4. 1 2 3 Adding Counting Numbers 1+2+3+4+5 Make a perfect rectangle by adding the same number of abacus beads without moving the original beads. Now you have 2 x the beads you started with! 6 6 6 We now have 5 rows of 6 and 6x5 = 30. We now take back ½ of 30 and get 15 as the sum of 1+ 2+ 3 + 4 + 5. Does this method work again? 4 6 5 6

5. Adding Counting Numbers Well done! Let’s review the results. 1+2+3 = ½ of 3x4 = 6 1+2+3+4 = ½ of 4x5 = 10 1+2+3+4+5 = ½ of 5x6 = 15 Do you see the pattern? Let’s try 1+2+3+4+5+6+7+8+9+10! 1+2+3+4+5+6+7+8+9+10 == ½ of 10x11 = 55 Let’s try 1+2+……….+99+100! 1+2+……………….+99+100 == ½ of 100x101 = 5050 WOW! My Problem! My Way! My Way! Think!