Question

round 2: estimate each product to find the correct expression. which expression is closer to 300? $5 \times 63$ which expression is closer to 600? $27 \times 19$ $6 \times 199$

Explanation:

Step1: Estimate $5\times63$

Round 63 to 60: $5\times60=300$
Actual value: $5\times63=315$
Difference from 300: $|315-300|=15$

Step2: Estimate $27\times19$

Round 27 to 30, 19 to 20: $30\times20=600$
Actual value: $27\times19=513$
Difference from 600: $|513-600|=87$

Step3: Estimate $6\times199$

Round 199 to 200: $6\times200=1200$
Actual value: $6\times199=1194$
Difference from 600: $|1194-600|=594$

Answer:

1. The expression closer to 300 is $5\times63$
2. The expression closer to 600 is $27\times19$