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Estimation
Mental Math
Calculation
Problem Solving
All Mixed Up!
100
The approximate product of 5 x 458.
What is about 2250.
100
The product of 6 x 1000.
What is 6 000?
100
THe product when you calculate 465 x 3.
What is 1 395?
100
The number of passengers that can be carried on ten 48-passenger buses.
What is 480 passengers?
100
The product of 5 x 400 + 7 x 50.
What is 2 350?
200
The approximate product of 6 x 48.
What is 300?
200
The product of 8 x 0.5.
What is 4?
200
The product of 8 x 215.
What is 1 720.
200
The cost of two 4-packs of pens when one 4-pack costs $9.95.
What is $19.90?
200
The product of 12 x 12.
What is 144?
300
The approximate product of 37 x 49.
What is about 2 000?
300
The product of 60 x 40.
What is 2 400?
300
The product of 45 x 53
What is 2 385?
300
The number of eggs in 8 dozen.
What is 96 eggs?
300
The next three numbers in the pattern 0.3, 3.0, 30, 300, ____, ____, ____.
What is 3 000, 30 000, and 300 000?
400
The approximate product of 8 x 5.8
What is about 48?
400
The three next terms in the pattern 12, 24, 36, 48, ____, ____, ____.
What is 60, 72 and 84?
400
The product of 10 x 25.3
What is 253?
400
The number of years in 12 millenia if each milennium has 1 000 years.
What is 12 000 years?
400
The number of weiners in 7 packages if each package contains 8 weiners.
What is 56 ?
500
The approximate product of 71 x 89 + 200.
What is about 6 500?
500
The product of 0.45 x 100.
What is 45?
500
The product of 96 x 28.
What is 2 688?
500
The length of a fence in centimetres if the fence is 23 metres.
What is 2 300 cm?
500
The cost of 3 kg of grapes if 1 kg costs $3. 48
What is $10.44?