Math Rational Number

12345678910
Across
  1. 5. A word in math that replaces variable Substitution
  2. 7. is -3/5 positive or negative
  3. 9. 0.3 divided by 4
  4. 10. 6(-1/2+5/6)
Down
  1. 1. 169-4+7×-10
  2. 2. Is the answer to 0.5 square plus 2.5 15.88
  3. 3. 0.5(7.2-1.8)
  4. 4. 0.5squared plus 5.6 cubed minus 0.2 squared
  5. 6. A recipe needs 3/4 teaspoon black pepper and 1/4 red pepper. How much more black pepper does the recipe need?
  6. 8. Every month,Adriano receives a subscription fee $5 from each subscriber. The website had 200 subscribers,40 more joined, and 10 cancelled. How much money does he earn this month.