Question
Which is not the correct step for finding the sum of 34 and 16.
Hint:
An addition mental math technique is to dissect an addend. This approach might be more effective for some students than left-to-right addition. This method involves dividing up one addend in an equation into more manageable bits. Here we have given to find the first incorrect step for finding the sum of 34 and 16 mentally. So we will break the number in an appropriate way and then show which step is incorrect.
The correct answer is:
Now as we know that here we have to find the step by breaking one number. The fact that there are no steps to memorise is one of the best things about mental math. The "friendly number" addition approach facilitates working with large numbers. This is due to the fact that we are, in essence, decomposing the problem into more manageable components.
Friendly numbers are multiple of 10 like 20, 30, 40 which makes the calculations easy. Here we will use the the same and then find the step.
Now we have given 34 + 16, lets solve this.
We can break 34 to 10 and 6 or 15 and 1 so that it makes a friendly number.
34 + 16 = 34 + 6 + 10 or 34 + 16 = 34 + 1 + 15
These are the correct ways that can be used.
So, the incorrect step for finding the sum of 34 and 16 is
Here the concept of Break Apart Numbers is used where a number is divided into two parts to make addition easy. The concept of friendly numbers is also used so that it becomes easy for addition or subtraction purpose. So, the first incorrect step for finding the sum of 34 and 16 mentally is 34 + 7 + 11.
Related Questions to study
Find the number that makes the equation true.
23 + 7 = ⎕
Here the concept of Break Apart Numbers is used where a number is divided in two parts to make addition easy. The concept of friendly numbers is also used so that it becomes easy for addition or subtraction purpose. So, the first correct step for finding the sum of 28 + 36 mentally is 30.
Find the number that makes the equation true.
23 + 7 = ⎕
Here the concept of Break Apart Numbers is used where a number is divided in two parts to make addition easy. The concept of friendly numbers is also used so that it becomes easy for addition or subtraction purpose. So, the first correct step for finding the sum of 28 + 36 mentally is 30.
With the help of the image find the sum.
>>> Tens: 60 + 20 = 80
>>> Ones: 2 + 4 = 6
>>> Sum: 80 + 6 = 86
With the help of the image find the sum.
>>> Tens: 60 + 20 = 80
>>> Ones: 2 + 4 = 6
>>> Sum: 80 + 6 = 86
Find the missing ones or tens digits.
15 + 59 = ⎕4
15 + 59 = 74.
Find the missing ones or tens digits.
15 + 59 = ⎕4
15 + 59 = 74.
With the help of the image find the sum.
Tens: 30 + 10 = 40
Ones: 4 + 9 = 13
Sum: 40 + 13 = 53
With the help of the image find the sum.
Tens: 30 + 10 = 40
Ones: 4 + 9 = 13
Sum: 40 + 13 = 53
Find 34 + 49.
*** So, 34 + 49 = 83
Find 34 + 49.
*** So, 34 + 49 = 83
Find the missing ones or tens digits.
17 + 45 = 6⎕
>>> 17 + 45 = 62.
Find the missing ones or tens digits.
17 + 45 = 6⎕
>>> 17 + 45 = 62.
Find the missing number.
Since, the partial division of a number gives ones same as the digit in the one's place.
>>> 82 -> 80 + 2.
Find the missing number.
Since, the partial division of a number gives ones same as the digit in the one's place.
>>> 82 -> 80 + 2.
Find the partial sums:
Tens = 30 + 20 = 50
Ones = 5 + 4 = 9
Find the partial sums:
Tens = 30 + 20 = 50
Ones = 5 + 4 = 9
Find the partial sum of the given place value block.
>>> Tens: 10 + 20 = 30
>>> Ones: 5 + 6 = 11
Find the partial sum of the given place value block.
>>> Tens: 10 + 20 = 30
>>> Ones: 5 + 6 = 11
Find the missing number.
24 - 4 = 20
Find the missing number.
24 - 4 = 20
Find the partial sum of the given place value block.
>>> Tens: 30 + 20 = 50
>>> Ones: 7 + 2 = 9
Find the partial sum of the given place value block.
>>> Tens: 30 + 20 = 50
>>> Ones: 7 + 2 = 9
