Concept explainers
(a)
To find:To solve expression 852 using mental maths.
(a)
Answer to Problem 3P
Explanation of Solution
Given information:
The expression 852
Calculation:
As the last digit of number is 5
So the square will end by 25
For finding first digit
Multiply 8 with its consecutive digit i.e. 9
So the answer is 7225
Conclusion:
(b)
To find:To provide other method for finding 852 by mental maths.
(b)
Answer to Problem 3P
The answer is
Explanation of Solution
Given information:
852
Calculation:
The number for multiplication are 85 and 85.
So firstly we draw slant lines for both the digits and lines of other digit will be opposite in direction.
Now count the intersection point and write it as ABC
In C the number is 25 so carry 2 in next section C=5
In B the intersection points are
B=2
In A the intersection points are
So the answer is
Conclusion:
The answer is
Chapter 8 Solutions
High School Math 2015 Common Core Algebra 1 Student Edition Grade 8/9
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