Question

a cardboard box has a mass of 800 grams when 4 books of equal mass are put into the box the filled box has a mass of 8 kilograms what is the mass of each book of gram

Answer 1

Answer: its 8,000 grams add to the nearest ten which makes it 8,000

I am doing the same math but multilping and dividing it.

Answer 2

its pretty easy remeber than 1kg eqauls 1000 grams (Kilo) means Thousand
so the 4 books would be 79,800 grams