Question

spiral review (5.nbt.2, 5.nbt.3a, 5.nbt.3b, 5.nbt.7)

1. the expression below shows a number in expanded form. what is the standard form of the number?

$(2 \times 10) + (3 \times \frac{1}{10})+ (9 \times \frac{1}{100})+ (7 \times \frac{1}{1,000})$

Explanation:

Step1: Calculate each term

$2 \times 10 = 20$
$3 \times \frac{1}{10} = 0.3$
$9 \times \frac{1}{100} = 0.09$
$7 \times \frac{1}{1000} = 0.007$

Step2: Sum all calculated terms

$20 + 0.3 + 0.09 + 0.007$

Answer:

20.397