Doubling and Halving
If we use the doubling and halving strategy the new problem would be:
24 x 25 =
12 x 50 =
Solve the equation:
(8 x 7) x 3
168
Using and over/under strategy solve:
99 x 17 =
(100 x 17) - (1 x 17) =
1700 - 17
1683
165 ÷ 15 =
11
Find the volume of a rectangular prism with the following dimensions:
6 x 7 x 4
168 units3
If we use the doubling and halving strategy the new problem would be:
42 x 23 =
21 x 46 =
Solve the equation:
(2 x 25) x 9
450
Using and over/under strategy solve:
101 x 12 =
(100 x 12) + (1 x 12) =
1200 + 12
1200
126 ÷ 14
9
Find the volume of a rectangular prism with the following dimensions:
12 x 4 x 5
240 units3
If we use the doubling and halving strategy the new problem would be:
15 x 16 =
30 x 8 =
Solve the equation:
(13 x 4) x 5
260
Using and over/under strategy solve:
104 x 7 =
(100 x 7) + (4 x 7) =
700 + 28
728
143 ÷ 11
13
Find the volume of a rectangular prism with the following dimensions:
11 x 15 x 3
495 units3
If we use the doubling and halving strategy the new problem would be:
21 x 14 =
Solve the equation:
(16 x 4) x 12
768
Using and over/under strategy solve:
97 x 12 =
(100 x 12) - (3 x 12) =
1200 - 36 =
1164
120 ÷ 16 =
7 R8
What is the volume of a box that has a base of 34 and five layers?
170 units3
If we use the doubling and halving strategy the new problem would be:
60 x 15 =
30 x 30 =
Solve the equation:
9 x (10 x 14)
1,260
Using and over/under strategy solve:
94 x 11 =
(100 x 11) - (6 x 11) =
1100 - 66
1144
206 ÷ 12 =
17 R2
What is the volume of a rectangular prism that has a base of 62 and 12 layers?
744 units3