Multiplication
16 x 10=
160
49 x 21=
1,029
Bobby filled 13 bags with 15 shells in each bag. How many shells did he collect?
195
Greg bought 10 boxes of cookies. Each box had 15 cookies. How many cookies did Greg buy?
150
85 x 15=
1,275
85 x 23=
1,955
Mrs. Bartlow bought 42 boxes of paint for a party. Each box had 5 sets of paint. How many sets of paint did Mrs. Bartlow buy?
210
Suzie read 12 books. Each book had 73 pages. How many pages did Suzie read?
876
16 x 13=
208
12 x 37=
444
Mr. Smith bought 28 notebooks. Each notebook has 54 pages. What is a good way to estimate the total number of pages Mr. Smith bought?
30 x 50=1,500
Lucas baked 18 dozen chocolate chip cookies and 15 dozen peanut butter cookies. About how many cookies did Lucas bake?
20 x 20=400
23 x 30=
690
30 x 15=
450
The product of two factors is 1,200. One of the factors is 20. What is the other factor?
60
The product of two factors is 6,300. If one of the factors is 9, what is the other factor?
700
99 x 28=
2,772
89 x 45=
4,005
Ben swam 14 laps 12 times in May. He swam 15 laps 16 times in June. How many total laps did Ben swim?
408
. Mary needs to make 37 beaded necklaces. She puts 42 beads on each necklace. Which is the best way to use rounding to estimate the number of beads Mary needs? What is the exact number of beads?
40 x 40
1,554