Doubling and Halving
Parenthesis
Over/Under Strategy
Division
Volume
100

If we use the doubling and halving strategy the new problem would be: 

24 x 25 = 

12 x 50 = 

100

Solve the equation: 

(8 x 7) x 3 

168 

100

Using and over/under strategy solve: 

99 x 17 =

(100 x 17) - (1 x 17) = 

1700 - 17 

1683

100

165 ÷ 15 = 

11

100

Find the volume of a rectangular prism with the following dimensions: 

6 x 7 x 4 

168 units3

200

If we use the doubling and halving strategy the new problem would be: 


42 x 23 = 

21 x 46 = 

200

Solve the equation:

(2 x 25) x 9 

450 

200

Using and over/under strategy solve: 

101 x 12 = 

(100 x 12) + (1 x 12) = 

1200 + 12 

1200 

200

126 ÷  14 

9

200

Find the volume of a rectangular prism with the following dimensions: 

12 x 4 x 5 

240 units3

300

If we use the doubling and halving strategy the new problem would be: 


15 x 16 = 

30 x 8 = 

300

Solve the equation: 


(13 x 4) x 5 

260

300

Using and over/under strategy solve: 


104 x 7 = 

(100 x 7) + (4 x 7) = 

700 + 28 

728 

300

143 ÷  11 

13

300

Find the volume of a rectangular prism with the following dimensions: 

11 x 15 x 3

495 units3

400

If we use the doubling and halving strategy the new problem would be: 


21 x 14 =

42 x 7 = 
400

Solve the equation:

(16 x 4) x 12

768

400

Using and over/under strategy solve: 

97 x 12 = 

(100 x 12) - (3 x 12) = 

1200 - 36 = 

1164

400

120 ÷  16 = 

7 R8 

400

What is the volume of a box that has a base of 34 and five layers? 

170 units3

500

If we use the doubling and halving strategy the new problem would be: 


60 x 15 = 

30 x 30 = 

500

Solve the equation: 

9 x (10 x 14) 

1,260

500

Using and over/under strategy solve: 

94 x 11 = 

(100 x 11) - (6 x 11) = 

1100 - 66 

1144

500

206 ÷  12 = 

17 R2

500

What is the volume of a rectangular prism that has a base of 62 and 12 layers? 

744 units3

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