Just Numbers
8 x 9
72
Find the volume of a prism with:
L: 5in
W: 8 in
H: 2 in
80 inches3
8 x 15
4 x 30
To find 19 x 14, I find 20 times 14 and remove a group of 14
(20x14) -14
7 x 5 x 2
70
Find the volume of a prism with:
L: 14 in
W: 3in
H: 4in
168 in3
4 x 21
2 x 42
To find 6 x 15, I double and I halve.
3 x 30 =90
50 x 9 x 2
900
Find the volume of a prism with:
L: 15
W: 6
H: 12
1080 in3
4 x 81
2 x 162
To find 21 x 7, I solve for 20 times seven and add a group of 7.
(20 x7) + 7
78 x 89
6942
Find the volume of a prism with:
L: 13in
W: 13 in
H: 13 in
2197 in3
16 x 12 = ___ x 6
To find 15 x 8, I double, double, double.
((15 x 2) x 2) x 2
14,527
The volume of a shape is 530. Write an equation for a box that could have this volume.
Multiple options.
7 x 18 = ___ x 9
14
To find 18 x 15, I find 20 times 15 and remove 2 groups of 15.
(20 x 15) - (2 x15)