Instructions

What value should come in the place of question mark (?) in the following questions?

Question 86

$$3.2\times2.1\times1.6$$=?

Solution

We can write 3.2 as $$1.6 \times 2$$

Then equation will be $$1.6 \times 1.6 \times 4.2 = 2.56 \times 4.2 = 10.75$$

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