2. Subtraction Strategies: Counting On by tens to subtract: 130 – 80

4. Mr. Lee had 134 pieces of candy in a bowl. He gave away 58 pieces of candy. How many pieces does he have left?

6. Math Mountains

7. Practice 9 -- + 5 4 9 5 4

8. -- + 5 7 5 7 7 + 5 = 32 12 10+2=12

9. Math Mountains First Grade Third & Fourth Grades Second Grade 7 + 5 = 32 10 + 2 = 12 4 6 2 + -- 6 - = 2 6 3 x 2....

11. David has 5 marbles. Anna has 8 marbles. How many more marbles does Anna have? David has 5 marbles. Anna has 8 marbles. How many fewer marbles does David have? There are 15 fish in a tank. 12 are goldfish, the rest are angelfish. How many more goldfish are there than angelfish? 1. 2. 3.

12. 21 x 4 4 20+1 4 x 20 = 80 80 + 4 84 17 x 4 4 17 = 10+7 40 +28 68 40 28 4x1 = 4 20= 4