solve the following mentally:1.65% of 1002.90% of 1203.20% of 124.30% of 205.25% of 606.75% of 207.200% of 1008.300% of 2009.125% of 10010.25% of 200
Answer (1)
Answer:Here are the solutions, solved mentally: 1. 1.65% of 100:1% of 100 is 1,so 1.65% is 1.65.2. 90% of 120:10% of 120 is 12,so 90% is 9 times that, or 108.3. 20% of 12:10% of 12 is 1.2,so 20% is twice that, or 2.4.4. 30% of 20:10% of 20 is 2,so 30% is 3 times that, or 6.5. 25% of 60:25% is the same as 1/4,and 1/4 of 60 is 156. 75% of 20: 75% is the same as 3/4,and 3/4 of 20 is 15.7. 200% of 100:100% of 100 is 100,so 200% is twice that, or 200.8. 300% of 200:100% of 200 is 200,so 300% is 3 times that, or 600.9. 125% of 100:100% of 100 is 100,and 25% of 100 is 25,so 125% is 125.10. 25% of 200:25% is the same as 1/4,and 1/4 of 200 is 50.
