Math Challenge

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Across
  1. 1. 2+2=4
  2. 4. the value of 4 in 45
  3. 7. strategy that shows the whole and the parts
  4. 8. when you join two numbers together
  5. 13. coin that is worth 5 cents
  6. 14. 8+8
  7. 15. a math sentence
Down
  1. 1. coin with Franklin D. Roosevelt
  2. 2. the number that stays in your head when you count on
  3. 3. to count from one number to another
  4. 5. to take away
  5. 6. coin with George Washington
  6. 9. the value of 1 in 21
  7. 10. number line strategy where you subtract
  8. 11. coin with Abraham Lincoln
  9. 12. 7+3