What should come in place of question mark (?) in the following questions?
We need to find the value of $$12 \times 3.5 - 8.5 \times 3.2$$
$$12 \times 3.5 = 42$$
and, $$8.5 \times 3.2 = 27.2$$
Hence, the difference equals $$42 - 27.2 = 14.8$$
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