1. Find the difference $8.4 - 7.35$. $$8.4 - 7.35 = 1.05$$ 2. Find the difference $12.5 - 8.7$. $$12.5 - 8.7 = 3.8$$ 3. Find the difference $17.50 - 6.25$. $$17.50 - 6.25 = 11.25$$ 4. Find the difference $18 - 5.63$. $$18 - 5.63 = 12.37$$ 5. Find the difference $4.355 - 1.647$. $$4.355 - 1.647 = 2.708$$ 6. Find the difference $60.54 - 0.928$. $$60.54 - 0.928 = 59.612$$ 7. Find the difference $89 - 58.46$. $$89 - 58.46 = 30.54$$ 8. Find the difference $104.003 - 21.78$. $$104.003 - 21.78 = 82.223$$ 9. Find the sum and difference $14.6 - 1.98 + 3.7$. First subtract: $$14.6 - 1.98 = 12.62$$ Then add: $$12.62 + 3.7 = 16.32$$ 10. Find the sum and difference $5.67 + 0.34 - 2.05$. First add: $$5.67 + 0.34 = 6.01$$ Then subtract: $$6.01 - 2.05 = 3.96$$ 11. Find the sum and difference $0.19 + 2.34 - 1.003$. First add: $$0.19 + 2.34 = 2.53$$ Then subtract: $$2.53 - 1.003 = 1.527$$ 12. Find the sum and difference $21.90 - 0.45 - 2.34$. First subtract: $$21.90 - 0.45 = 21.45$$ Then subtract again: $$21.45 - 2.34 = 19.11$$