Answer:
Exact: 50.8064
Rounded to nearest whole #: 51
Explanation:
Our units are: Milligrams, Grams, and Kilograms. For Reference;
Miligrams are 1 million (1,000,000) times smaller than kilos.
Grams are 1 thousand (1,000) times smaller than kilos.
If we divide Franklins weight, 46,266,400 mg, by 1,000,000, our answer is 46.2664 kg, 46 if we round it.
Now, for his baby brother, his weight is 4,535.9 g. Divide this by 1000, and you should get 4.5359 kg, 4.5 if we round it to the nearest tenth.
Now simply add our two answers and you have both of their weight combined.
This is pretty simple, you simply can move the decimal point a certain amount of times dependent on how bigger or smaller your unit is. If we were converting kilograms to grams, we would multiply a value by 1,000, and the inverse for grams to kilograms, which moves the decimal point 3 times.
Any questions? Just ask me. Thanks.