book Maths Puzzle Numerical Ability

please help me in this question......

2.8*10^4+3.2*10^5

Read Solution (Total 0)

book Other Question

Can you please help me with the following problem:
How do you find the least common multiple (LCM) for the following group of numbers? 12, 20, and 35.

Can you break down your answer so I will be able to understand?
Thanks!
You have $32 to spend on supplies for your science fair project. If you buy two plants for expirements, you will have $18 left for other supplies. How much is each plant?