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