22 1/2 + 15 2/3 + 18 3/5 equals?

lynn30k | High School Teacher | (Level 1) Educator

Posted on

Be careful not to put numbers in the numerator that shouldn't be there.  30 should indeed be the new denominator; you then have 1/2 = 15/30, 2/3 =20/30, and 3/5 =18/30.  Adding the fractions, you get 53/30, or 1 & 23/30.

The whole numbers 22+15+18= 55.  Add the 1 23/30, and the answer is 56  23/30

cby | High School Teacher | (Level 1) Adjunct Educator

Posted on

Note:

Many math textbooks will show answers as follows: your answer should always be in the form with which you started.

Example 1: if your problem begins with a mixed number, then your answer should be in a mixed number instead of a fraction.

The exception to these three examples are when the problem reduces to a whole number.

vinnysmom | Elementary School Teacher | eNotes Newbie

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When you add fractions, you need to start with making sure your denominators all work together. A common denominator for 1/2, 2/3, and 3/5 would be 30, so your new numbers would be 22 15/30 + 15 20/30 and 18 18/30. When you add the fractional parts together, you get 55 and 53/30. The fraction can be reduced to 1 and 23/30. So, you add that to the other part and you get 56 23/30.  Hope that helps. :-)

rachellopez | Student, Grade 12 | (Level 1) Valedictorian

Posted on

First off, you can add the whole numbers (22 + 15 + 18) which equals 55. Adding the whole numbers is the easy part, but now you have to get fractions with like denominators. The denominators of 2, 3, and 5 all are divisible by 30.

1/2*(15/15)=15/30

2/3*(10/10)=20/30

3/5*(6/6)=18/30

Now that you have like denominators, you can add straight across. You now have the single fraction of 53/30, which can be simplified to 1 and 23/30. Add that to your 55 and your final answer is 56 and 23/30.

nisarg | Student, Grade 11 | (Level 1) Valedictorian

Posted on

22 1/2 + 15 2/3 + 18 3/5

`22 15/30 + 15 20/30 + 18 18/30`

`22+15+18+53/30`

`55 53/30`

``

zumba96 | Student, Grade 11 | (Level 3) Valedictorian

Posted on

22 1/2 + 15 2/3 + 18 3/5 equals?

Change them all into mixed numbers

45/2 + 47/3 + 93/5

Find the LCM and multiply

675/30 + 470/30 + 558/30 = 1703/30 = 56. 76667 or 56 23/30

atyourservice | Student, Grade 11 | (Level 3) Valedictorian

Posted on

Add up all the whole numbers 22+15+18= 55

then multiply the fractions so that they have the same common denominator (30)

`1/2 xx 15= 15/30`

`2/3xx10 =20/30`

`3/5 xx 6 =18/30`

`15/30 +20/30 +18/30 =53/30 `   which can be simplified into `1 23/30`

`55 + 1=56+ 23/30 = 56/30`

`56 23/30`

revolution | College Teacher | (Level 1) Valedictorian

Posted on

Change all mixed numbers into mixed numbers:

22 1/2 + 15 2/3 + 18 3/5= 45/2 + 47/3 + 93/5

Next, convert denorminator into common multipe which should be 30

675/30 + 470/30 + 558/30 = 1703/30

= 56 23/30 (mixed number)

dracomath | Student, Grade 11 | (Level 1) Honors

Posted on

When adding fractions, you must make all denominators equal.  Otherwise, the result is incorrect.  Add the whole numbers and numerators after finding the LCD which is 30.

22 1/2 + 15 2/3 + 18 3/5

22 15/30+15 20/30+18 18/30

55 53/30

56 23/30