A local hamburger shop sold a combined total of 558 hamburgers and cheeseburgers on Wednesday. There were 58 more cheeseburgers sold than hamburgers. How many hamburgers were sold on Wednesday?

If you have 558 cheeseburgers and hamburgers, divide the numbers by 2. half of 558 is 279. then if you already know the total all you need to do is subtract 58 to 279 for the hamburgers and add 58 to the cheese burgers.

Making the 221 Hamburgers

and: 337.

How to check my work:

221 + 337 = 558

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.