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 2 paper clips weigh about  1 gram.
1 nickel weights about  5 grams
200 nickels weigh about 1000 grams or 1 kilogram.
 1.) There are 100 paper clips in a box. How many grams would a box of paper clips weigh?
 It would weight ____________ grams.
 2.) There are 20 boxes of paper clips in a carton. How many grams would a carton of paper clips weigh?
 The carton would weigh ___________ grams.
 3.) How many grams would a roll of 40 nickels weigh?
 The roll would weigh _____________ grams
 4.) How many nickels would weigh 5 kilograms?
 ____________ nickels would weigh 5 kilograms.
 5.) A truck is hauling 6 crates. Each crate weighs 35 kilograms. How much do all the crates weigh?
 They weigh ___________ kilograms.