Addition - Free MCQ Practice Test with solutions, Class 2 Mathematics ICSE

The expanded form of 56 is represented as 50 + 6, which clearly shows the value of each digit in terms of tens and ones.

When the sum of the ones digits (6 + 7 = 13) is 10 or more, you write down the ones digit (3) and carry over the tens digit (1) to the tens column for further addition.

The tens digits are 4 (from 42) and 3 (from 36). Adding these gives 4 + 3 = 7.

In the carry over method, if the ones sum is 15, you write down the 5 and carry over the 1 to the tens column, ensuring that the addition is done correctly.

The commutative property of addition states that changing the order of the numbers does not affect the sum. For example, 3 + 5 is the same as 5 + 3.

The first step is to write the three numbers vertically, aligning them by tens and ones, to facilitate the addition process.

Adding 26 and 40 gives you 66. You can confirm this by adding the tens (20 + 40 = 60) and ones (6 + 0 = 6), leading to a final sum of 66.

Adding zero to any number does not change the value of that number. This property of addition is essential for understanding how numbers work, especially for beginners.

A well-structured word problem should include a clear scenario, the numbers to be added, and a direct question about the total, making it easy for the reader to understand and solve.

The first step in adding 42 and 36 is to write the numbers vertically, aligning the tens and ones. This organization helps in performing the addition accurately.

To find the total, you add the ones (8 + 6 = 14, write 4 and carry 1) and then add the tens (2 + 3 + 1 = 6). Thus, 28 + 36 = 64.

By breaking down 36 into 30 and 6 and then adding 20 (which is already 20), you get 50 (30 + 20) and then add the 6 to get 56.

The breaking numbers method helps in mental addition by simplifying complex numbers into tens and ones, making it easier to perform calculations quickly and accurately.

"Carry over" refers to the process of moving a value from the ones column to the tens column when the sum of the digits in the ones column is 10 or more.

When using expanded form, you add the tens together and the ones together separately, then combine those results to find the total sum.