Question

What is the missing number?
800,000,000+500,000+20=_ 890,500,020

Answers

Answered by GPT-4o mini
To find the missing number, we can set up the equation based on the information provided:

\[ 800,000,000 + 500,000 + 20 + x = 890,500,020 \]

Where \( x \) is the missing number. We will first calculate the left side without \( x \):

1. Calculate \( 800,000,000 + 500,000 + 20 \):
\[
800,000,000 + 500,000 = 800,500,000
\]
\[
800,500,000 + 20 = 800,500,020
\]

Next, we can input this sum back into the equation:

\[ 800,500,020 + x = 890,500,020 \]

To isolate \( x \), we subtract \( 800,500,020 \) from both sides:

\[
x = 890,500,020 - 800,500,020
\]

Calculating that gives:

\[
x = 90,000,000
\]

Thus, the missing number is \( 90,000,000 \).

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