Question

1. whats the product? complete the equation.

$5 \times 4,000 = 5 \times 4 \times \underline{\quad\quad}$
$= \underline{\quad\quad} \times \underline{\quad\quad}$
$= \underline{\quad\quad}$

Explanation:

Step1: Decompose 4000

We know that \(4000 = 4\times1000\), so we fill the first blank with \(1000\).
\(5\times4000 = 5\times4\times1000\)

Step2: Calculate \(5\times4\)

Calculate \(5\times4 = 20\). Now the equation becomes \(20\times1000\).
\(5\times4\times1000=20\times1000\)

Step3: Calculate the final product

Multiply \(20\) and \(1000\), we get \(20\times1000 = 20000\).

Answer:

First blank: \(1000\), second blank: \(20\), third blank: \(1000\), fourth blank: \(20000\) (So the completed equation is \(5\times4000 = 5\times4\times\boldsymbol{1000}= \boldsymbol{20}\times\boldsymbol{1000}=\boldsymbol{20000}\))