Question

If 8 boards are stacked on top of each other and each board is 2 1/4 inches thick, how high is the stack?

Answer 1

8 x 2 1/4 = 18

the stack is 18 in. thick.

Hope this helps!!
~Kiwi

Answer 2

It's the same as 2 1/4 times 8. There's an image to show why. An easy way to mentally solve it is to do 2•8=16 first, and then 8/4=2, 16+2=18. I hope this helped!!❤️