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# Estimate Sums

Consider the following options:

48 + 47

12 + 49

74 + 24

28 + 51

Let's identify the expression that has a sum nearly about 80.

Find the sum of each expression by rounding the addends.

Let’s look at first option.

Round the addends to the nearest tens and then add.

48 |
+ |
47 |
= |
? |

↓ |
↓ |
|||

50 |
+ |
50 |
= |
100 |

This expression has a sum nearly equal to 100.

Now, look at second option.

12 |
+ |
49 |
= |
? |

↓ |
↓ |
|||

10 |
+ |
50 |
= |
60 |

This expression has a sum nearly equal to 60.

Now, look at third option.

74 |
+ |
24 |
= |
? |

↓ |
↓ |
|||

70 |
+ |
20 |
= |
90 |

This expression has a sum nearly equal to 90.

Now let’s look at the last option.

28 |
+ |
51 |
= |
? |

↓ |
↓ |
|||

30 |
+ |
50 |
= |
80 |

This expression has a sum nearly equal to 80.

So, 28 + 51 has a sum nearly to 80.

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### Help

The correct answer is

##### Remember :

The smallest number is the one that comes first while counting.

##### Solution :

To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.

21,27,23

21 is the smallest number.