Mathematics
Grade-2
Easy
Question
Use partial sums to find the sum of 31 and 26.
- 48
- 47
- 58
- 57
Hint:
To find partial sums add the digits in tens place and ones place seperately.
Place value is the value of each digit in a number. For example, the 5 in 350 represents 5 tens, or 50; however, the 5 in 5,006 represents 5 thousands, or 5,000. It is important that children understand that whilst a digit can be the same, its value depends on where it is in the number.
The correct answer is: 57
To find partial sums add the digits in tens place and ones place seperately.
Partial sum of 31 + 26
Step 1 : Add digits in tens and ones place seperately:
30 01
+ 20 and + 06
_____ ______
50 07
Thus, the sum of 31 + 26 are 50 + 07 = 57.
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