easy 1

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Across
  1. 2. 2 times 1 +1
  2. 3. 4/3*pie*radius square is used to measure volume
  3. 7. horizontal line used in mathematical
  4. 8. 3*3
  5. 10. angles less than 90 degree
Down
  1. 1. 14/2+5+3-8
  2. 4. 181-17*10
  3. 5. number like 0,2,4,6,8 etc
  4. 6. the numeral for 'C'
  5. 9. 94's roman numeral