Answer:
1) 11.3112
2) 16.3965
3) 98.4906
4) 0.02142
Explanation:
1. We know that for 15.71, the decimal point is two places to the left. We also know that for 0.72, the decimal point is two places to the left. 2 + 2 = 4
So in the product, the decimal point is going to be four places to the left. When multiplying, ignore the decimal points. 1571 * 72 = 113112. Now, add the decimal point. It would be 11.3112
2. We know that for 9.645, the decimal point is three places to the left. We also know that for 1.7, the decimal point is one place to the left. 3 + 1 = 4
So in the product, the decimal point is going to be four places to the left. 9645*17 = 163965. Now, add the decimal point. It would be 16.3965.
3. We know that for 42.09, the decimal point is two places to the left. We also know that for 2.34, the decimal point is two places to the left. 2 + 2 = 4
So in the product, the decimal point is going to be four places to the left. 4209 * 234 = 984906. Now, add the decimal point. It would be 98.4906.
4. We know that for 0.051, the decimal point is three places to the left. We also know that for 0.42, the decimal point is two places to the left. 3 + 2 = 5
So in the product, the decimal point is going to be five places to the left. 51 * 42 = 2142. Now, add the decimal point. It would be 0.02142.