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

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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.

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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.

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

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posted by Tasha
4. I am so stupid, I cant even answer this question!

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5. aaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhhh!!!!!!!!!!!!!!!!!

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

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