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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.

ds

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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.

21,27,23

21 is the smallest number.