Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$5.2 \times 2.1$$

Answer

10.92

Solution


Use the algorithm method.
5.2
×2.1
0.52
1
10.40
10.92
Therefore, \(5.2\times 2.1=10.92\).
\[10.92\]
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