Partial Products
When multiplying 26 x 3 this would be one of your partial products.
What is 18 or 60?
There were 14 adults at the Jones family reunion and twice as many children. This is the number of children at the reunion
What is 28?
This is the product of 104 times 4
What is 408
The lighthouse is 76 feet tall and has 99 stairs. An ocean liner is 3 times as tall as the lighthouse. This is the extra information that you don’t need to find out how tall the ocean liner is.
What is that the lighthouse has 99 steps.
Annie says that 305 x 5 is 515. This is how you know if her answer is reasonable.
What is round 305 to 300 and multiply 300 x 5 which equals 1,500 so her answer is not reasonable.
These would be the partial products when multiplying 26 times 4
What is 24 and 80
A chain music store has 23 locations. Each store hires 5 clerks. This is how many clerks work for the store.
What is 115?
An office supply store sells 605 packages of paper in 1 month. This is how many packages of paper are sold in 6 months.
What is 3630
David bought a 3-ring binder for $4, a package of pencils for $1, and 2 packages of paper. this is the information that is needed to find the total amount David spent.
What is the cost of the paper
This is what would you do to check if your answer of 475 x 3= 1,425 is reasonable.
What is you would round 475 to 500 and 500 x 3= 1,500 so the answer is reasonable.
A radio station played a new hit song 34 times a day for 4 days. These are the partial products you would use to find how many times the song was played in all
What is16 and 120
Denise bought four pairs of shoes. Each pair cost $54. This is how much the skates cost.
What is 216 dollars?
A factory produced 275 cars in one week. This is how many cars could the factory produce in 4 weeks?
What is 1100 cars?
The band went on a bus trip to an amusement park. Each student paid $25 for the bus ticket. The cost to the amusement park was $25 for children and $40 for adults. This is the information that is not needed to find how much each student spent on the trip.
What is how much the adults paid to get into the park?
A construction company uses 1,020 nails for each house it builds. They are building 5 houses and said they will need 50,105 nails. This is how you will know if their answer is reasonable?
What is round 1,020 to 1,000 and 1,000 x 5= 5,000 so the answer is NOT reasonable