Question

Solve this in standard form multiplication and division (4.5×10) ×(4.2×10) ÷(8×10)​

Answer 1

23.63

Explanation:

First you want to start with PEMDAS (Parentheses, Exponents, Multiplication, Division, Addition and Subtraction)

Since we have parentheses we will start with those

`4.5 * 10 = 45\\4.2 *10 =42\\8 *10= 80`

for the decimals whenever you multiply a decimal by 10 you move the period one over to the right

now our equation looks something like this:

45 * 42 ÷ 80

for multiplication and division it doesn't matter which comes first as long as its in the order of the equation

`45 * 42 = 1890`

now we divide that by 80

1890 ÷ 80= 23.625

so then we rounded the 2 to 3 because if the number to the right is ≥ (greater than or equal to) 5 we round up, therefore having:

23.63