- MIXED OPERATIONS
- ADD AND SUBTRACT TENS
Add and Subtract Tens
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Let's find the sum of 68 and 70.
68 + 70 = ?
68 can be written as 6 tens and 8 ones.
70 can be written as 7 tens.
68 + 70 = 6 tens + 8 ones + 7 tens
Now, add tens.
6 tens + 8 ones + 7 tens
= (6 tens + 7 tens) + 8 ones
= 13 tens + 8 ones
So, 68 + 70 = 138.
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The correct answer is
The smallest number is the one that comes first while counting.
To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.
21 is the smallest number.