Multiply Mentally
4x10
40
41x2
82
33x2
66
Bart has 208 model cars. Manny has 3 times as many model cars. How many model cars does Manny have?
208x3 = 624 cars
Mitch has 305 marbles. Paul has 3 times as many marbles. How many marbles does Paul have?
915 marbles
10x7
70
46x3
138
27x3
81
Dana jogs 1,055 minutes a month. How many minutes will she job in 4 months?
1,055x4= 4,220 minutes
Elizabeth has 2,038 stamps in an album. How many stamps will she have in 4 albums?
8,152 stamps
200x3
600
231x4
924
341x4
1,364
Mr. and Mrs. Hartford want to buy a car that costs $8,675. Mr. Hartford save $1,305 each month for 3 months. Mrs. Hartford save $1,574 each month for 3 months. If they combine their money, how much will they have? Will they have enough money to buy the car?
$1,305 x 3= $3,915
$1,574 x 3= $4,722
$3,915 + $4,722 = $8,637
No
Number of Shells Collected in One week:
Group 1 - 2,632
Group 2 - 2,018
Group 3 - 821
Group 4 - 320
If Group 3 collects the same number of shells in a second week, about how many shells will they have collected in those 2 weeks?
800x2=1,600 shells
5x400
2,000
1,259x5
6,295
1,692x5
8,460
Number of Campers for One Week:
Camp Augustine - 4,216
Camp Timber - 1,840
Camp Bristol - 876
Camp Bell - 349
If the same number of campers go to Camp Augustine each week, about how many campers will go there over 3 weeks?
4,000 x 3=12,000
Number of Shells Collected in One week:
Group 1 - 2,632
Group 2 - 2,018
Group 3 - 821
Group 4 - 320
Group 2 collects the same number of shells each week. How many shells will they collect in 4 weeks? Is an estimate or exact answer needed?
exact
2,018x4=8,072 shells
5x2,000
10,000
1,692x5
8,460
1,055x4
4,220
Number of Campers for One Week:
Camp Augustine - 4,216
Camp Timber - 1,840
Camp Bristol - 876
Camp Bell - 349
The same number of campers go to Camp Bristol each week. About how many campers will go there over 5 weeks? Is this an estimate or exact answer?
900x5=4,500
estimate
Number of Campers for One Week:
Camp Augustine - 4,216
Camp Timber - 1,840
Camp Bristol - 876
Camp Bell - 349
The same number of campers go to camp each week. How many more campers go to Camp Timber in 3 weeks than go to Camp Bell in 5 weeks? Is an estimate or exact answer needed?
exact
Camp Timber = 1,840x3=5,520
Camp Bell= 349x5=1,745
5,520-1,745 = 3,775 more campers