True or False
39 × 13 = (39 × 13) + (1 × 13)
False
To find 16 x 15, I double and halve.
8 x 30
Riley counted the number of balls on one layer of a box, 34. The box has 8 layers. How many balls can the box hold?
2 x 5 =
10
Fill in the blank:
To find volume, you multiply length x width x _______
height
67 × 18 = (67 × 20) − (67 × 2)
True
To find 27 x 9, I find 27 times 10 and remove 1 group of 27.
(27 x 10) - (1 x 27)
OR
(27 x 10) - 27
A box holds 396 balls. Each layer has 33 balls. How many layers does the box have?
396 / 33 = 12 layers
18
L: 2
W: 5
H: 7
70 cubic units
(2 × 5) × 4 = 2 × (5 × 4)
True
To find 15 times 27, I multiply 10 times 27 and add it to 5 times 27.
(10 x 27) + (5 x 27)
Four friends washed cars all day on Saturday and earned $66.00. They shared the work equally, so they want to share the money they earned equally. How much money will each person get?
$66 / 4 = $16.50 per person
7 x 4 =
28
(4x3) x 5
60 cubic units
To find the volume of a box that has a 19 by 22 base and 27 layers, I multiply the dimensions of the base first and then multiply by the number of layers.
( 19 x 22 ) x 27
There are 100 people on the swim team. Today, they are going to a big swim meet on the other side of town. If each minivan can take 15 people, how many minivans will they need to take everyone on the team?
100 / 15 = 6 R 10, or 7 vans
9 x 8 =
72
Fill in the blank:
( __ x 6 ) x 8 = 144
3