2. She got her looks from her father. He's a plastic surgeon. Groucho Marx (1890 – 1977)

3. Why do we estimate things? How do we know when to estimate? Does the information need to be accurate or general? Does it need to be exact? Are you going to use the measurement for further calculations? Do you have time? General rule: 5 and above round up, 4 and below round down Exp: 9.6 to the nearest ones place = 10 Exp: 9.43 to the nearest ones place = 9

4. Tricky one: Round to the nearest ten 195.09 Have to move it on to the next place value 200

5. Round the explosion (underlined value) to the nearest million, hundred thousand, ten thousand, and thousand. 9,000,000; 9,000,000; 8,950,000; 8,953,000 Largest Conventional Explosion The largest single conventional explosive detonation was for the demolition of the German fortifications at Helgoland on April 18, 1947. A charge of 4061 tonnes (8,952,961 lb) was detonated by Commissioned Gunner E.C. Jellis of the Royal Navy demolition team headed by Lt. F.T. Woosnam aboard HMS Lasso lying 14.5 km (nine miles) out to sea.

6. Estimating really helps when you want an approximation when using math operations, round the numbers first then perform the operation, THERE IS MORE THAN ONE ANSWER Estimate the following 14.6 + 98.076 15 + 98 113 273.88 * 4.65 274 * 5 1370 300 * 5 1500

8. Pg 113 7-11, 17-20, 25, 28, 34, 37