4.2*2.1

asked by guest
on Nov 18, 2024 at 8:41 am



You asked:

Evaluate the expression: \(4.2 \cdot 2.1\)

MathBot Answer:

\[4.2 \cdot 2.1 = \frac{441}{50} = 8.82\]

\[\begin{aligned}4.2 \cdot 2.1& = \left(4 + \frac{2}{10}\right) \cdot \left(2 + \frac{1}{10}\right)\\& = \left(4 + \frac{1}{5}\right) \cdot \left(2 + \frac{1}{10}\right)\\& = \frac{21}{5} \cdot \left(2 + \frac{1}{10}\right)\\& = \frac{21}{5} \cdot \frac{21}{10}\\& = \frac{441}{50}\end{aligned}\]

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