Multiplication: What does it mean to use front-end estimation?

Answer 1

I think it means to multiply the first digits. For example: 310 times 240 = 3 times 4. Add a couple of zeros and you'll get 1200.

Answer 2

I need to diagram triangle, square,rhombus, rectangle, trapezoid and octagon in a venn diagram. Parallelograms and pane figures. I cannot understand which are plane figures. Help! thanks.

Answer 3

Writing to Explain: Which is greater, the greatest whole number with 5 digits or the least whole number w/ 6 digits?

Answer 4

I am so stupid, I cant even answer this question!

Answer 5

What does it mean to front-end estimation in subtraction?