312+118

A mixed number is an addition of its whole and fractional parts.

3+12+118

Add 3 and 12.

To write 3 as a fraction with a common denominator, multiply by 22.

3⋅22+12+118

Combine 3 and 22.

3⋅22+12+118

Combine the numerators over the common denominator.

3⋅2+12+118

Simplify the numerator.

Multiply 3 by 2.

6+12+118

Add 6 and 1.

72+118

72+118

72+118

72+118

A mixed number is an addition of its whole and fractional parts.

72+1+18

Add 1 and 18.

Write 1 as a fraction with a common denominator.

72+88+18

Combine the numerators over the common denominator.

72+8+18

Add 8 and 1.

72+98

72+98

72+98

To write 72 as a fraction with a common denominator, multiply by 44.

72⋅44+98

Multiply 72 and 44.

7⋅42⋅4+98

Multiply 2 by 4.

7⋅48+98

7⋅48+98

Combine the numerators over the common denominator.

7⋅4+98

Multiply 7 by 4.

28+98

Add 28 and 9.

378

378

Factor 3 1/2+1 1/8