For 9- complete the operation and explain why you placed the

Question

decimal point where you did.
9. 1.8*0.3=

Answer 1

1.8*0.3 = 0.54

each multiplicand has one decimal place. So, the product has two.

Also, just by observation, 1.8 is almost 2, so the answer should be about twice as big as 0.3 (0.6)