Question

How do you evaluate `6.40\times 1.8`?

Answer 1

You can use the distributive law to simplify your calculations:
(a+b)(c+d)= ac+ bc + ad + bd

Explanation:

The above problem can be written as:

`6.40` x `1.8` = `(6 + 0.4)` x `(1 + 0.8)` = `6(1) + 0.4(1) + 6(0.8) + (0.80)(0.4) = 6 + 0.4+ 4.8 +0.32=11.52`