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Loaves of bread are sold in bags closed with plastic clips.$\newline$Students at East Lake School collected $1$ million of these clips.$\newline$They want to estimate the total mass of the clips, in kilograms.$\newline$Which rule will not give them a good estimation?$\newline$Count the number of clips in $10$ grams of clips, then multiply by $100000$.$\newline$Count the number of clips in $1$ kilogram of clips, then divide $1$ million by this number.$\newline$Find the mass of $1$ clip in grams, multiply by $1$ million and then divide by $1000$.$\newline$Find the mass of $20$ clips in grams, divide by $1000$ and then multiply by $10$$0$.