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12. Multiply: [tex]$0.2 \times 2.1$[/tex]

A. 49
B. 0.42
C. 4.2
D. 0.042


Sagot :

To multiply \(0.2\) by \(2.1\), follow these steps:

1. Set up the multiplication:
[tex]\[ 0.2 \times 2.1 \][/tex]

2. Perform the multiplication:
[tex]\[ 0.2 \times 2.1 = 0.42000000000000004 \][/tex]

3. Match the result with the given options:
[tex]\[ F \quad 49 \\ H \quad 0.42 \\ Q \quad 4.2 \\ J \quad 0.042 \][/tex]

The detailed calculation reveals that the exact product of multiplying \(0.2\) by \(2.1\) is close to \(0.42\). Thus, the correct answer from the provided options is:

[tex]\[ \boxed{H} \][/tex]