#5. D
#6. (4 x 100) + (4 x 70) + (4 x 6). which is the same thing as 4 x 176 when you work the problem out on a calculator
#7. C
#8. B
Let me know if you want me to try and explain any of those in more detail...it looks like they're just wanting you to see how it works and to have a solid understanding by having you break things down separately into the hundred's place, the ten's place and the one's place.
