As per the mental math calculation, the correct division equations are
C. 400 ÷ 8 = 50
D. 40,000 ÷ 800 = 50
E. 40,000 ÷ 80 = 50
Mental math calculation:
Mental math calculation means a group of skills that allow people to do math “in their head” without using pencil and paper or a calculator.
We can done any type of calculation like addition, subtraction, division etc. based on this method.
Given,
Here we have the following equations,
A. 400 ÷ 80 = 50
B. 4 , 000 ÷ 80 = 5
C. 400 ÷ 8 = 50
D. 40 , 000 ÷ 800 = 50
E. 40 , 000 ÷ 80 = 500
And we need to find the equations that are true by using the mental math calculation.
While we looking into the given expressions,
A. 400 ÷ 80 = 50
This one is false because when we cancel zero, and divide it we get 5 alone.
Then the next one is,
B. 4,000 ÷ 80 = 5
This one is false because when we cancel zero, and divide it we get 50 alone.
Third one is
C. 400 ÷ 8 = 50
This one is true because when we cancel zero, and divide it we get 50 as result.
Next is,
D. 40,000 ÷ 800 = 50
This one is true because when we cancel zero, and divide it we get 50 as result.
Final one,
D. 40,000 ÷ 80 = 500
This one is true because when we cancel zero, and divide it we get 500 as result.
Therefore, options C, D and E are true.
To know more about Mental math here.
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