ADDING AND SUBTRACTING DECIMALS WITH ESTIMATION

1. A ribbon company produces 31.46 meters of silk ribbon per hour and 2.19 meters of velvet ribbon per hour. In all, about how many meters of ribbon do they produce in an hour?

2. Alan weighs his book bag. It weighs 11.65 pounds. He takes out the dictionary and weighs it. The dictionary weighs 3.34 pounds. If he leaves the dictionary out, approximately how much will the book bag weigh?

3. Andrea buys a roll of ribbon that is 13.58 meters long. She needs 2.9 meters of ribbon to decorate a picture frame. Estimate how much ribbon will she have left.

4. Iris wants to buy a model airplane kit that costs $6.29. She also wants to buy a model car kit that costs $3.89. Approximately how much money will she need for both model kits?

5. The computer game that Parker wants to buy costs $21.07 with tax. He has $17.86. About how much more money does he need to buy the game?