answersLogoWhite

0

Subjects>Math>Math & Arithmetic

What does -18 plus 21 equal?

User Avatar

Anonymous

∙ 16y ago
Updated: 9/16/2023

I think it's -39

User Avatar

Wiki User

∙ 16y ago
Copy

What else can I help you with?

Continue Learning about Math & Arithmetic

What does eighteen plus three equal?

18 + 3 = 21


What is one half plus twelve over eighteen equal?

1/2 + 12/18 = 9/18 + 12/18 = 21/18 = 7/6


Which property does 21 plus 18 equals 18 plus 21?

Commutativity or Abelian property


What is 25 plus 21 plus 19?

25 plus 21 plus 19 is equal to 65.


What does 29 plus 18 plus 21 equal?

The answer is 68. Simply add the numbers together arithmetically as you would for the problem two plus two. To check your work, a calculator is the best option.

Related Questions

What does 18 plus 3 equal?

-15.


What does eighteen plus three equal?

18 + 3 = 21


What is one half plus twelve over eighteen equal?

1/2 + 12/18 = 9/18 + 12/18 = 21/18 = 7/6


Which property does 21 plus 18 equals 18 plus 21?

Commutativity or Abelian property


What 21 plus 21 equal?

21 + 21 = 42.


What is 18 plus 3?

-21


What does -21 divided by 18 equal?

-39


What is 25 plus 21 plus 19?

25 plus 21 plus 19 is equal to 65.


What is 16 plus 16 plus 16 plus 17 plus 18 plus 18 plus 18 plus 19 plus 19 plus 20 plus 20 plus 20 plus 21?

16 + 16 + 16 + 17 + 18 + 18 + 18 + 19 + 19 + 20 + 20 + 20 + 21 = 238


What does --21 equal?

18


What does - 12 plus - 9 equal to?

21


What does 18 plus 18 equal?

36

Trending Questions
What is a four digit mumber that is divisible by 6? A 3.2 m long board is how many dm long? Can anyone explain Dilatation's for Grade 9 Math in Alberta? What is Sixteen and one tenth as a decimal? Which fractions is not equivalent to fraction 1 over 3? What does 460 cubic centimeters equal in inches? How many thous in one tenth? What shape has 4 sides with one side being parallel? Do both diagonals bisect each other on a kite? What is extracting the square root? What is the term for A sequence of numbers in which the ratio between two consecutive numbers is a constant? What prime numbers go into 2020? What is the height of a rock that is thrown upward with an initial speed of 15 meter per second? Do all M and M s weigh the same? Give a lesson plan of standing line and sleeping line for nursery class? How do you reduce 9 over 12? Word problem of linear equations in two unknown? Which is greater 3.27 or 4.3? What is 40 out of 50 as a decimal? What is 2.5cm equals how many mm?

Resources

Leaderboard All Tags Unanswered

Top Categories

Algebra Chemistry Biology World History English Language Arts Psychology Computer Science Economics

Product

Community Guidelines Honor Code Flashcard Maker Study Guides Math Solver FAQ

Company

About Us Contact Us Terms of Service Privacy Policy Disclaimer Cookie Policy IP Issues
Answers Logo
Copyright ©2026 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.