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cant figure this out

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how do you subtract a fraction like 1 2/5 - 4/8

Oct 25, 2017

#1
+7352
+2

$$1\frac25-\frac48$$

$$\frac48$$  is the same as  $$\frac12$$

=  $$1\frac25-\frac12$$

$$1\frac25$$  is the same as   $$1+\frac25$$

=  $$1+\frac25-\frac12$$

Now we need a common denominator. Multiply and divide  1  by  10 .

=  $$\frac{10}{10}+\frac25-\frac12$$

Multiply and divide  $$\frac25$$  by  2 .

=  $$\frac{10}{10}+\frac{2*2}{5*2}-\frac12$$

=  $$\frac{10}{10}+\frac{4}{10}-\frac12$$

Multiply and divide  $$\frac12$$  by  5 .

=  $$\frac{10}{10}+\frac{4}{10}-\frac{1*5}{2*5}$$

=  $$\frac{10}{10}+\frac{4}{10}-\frac{5}{10}$$

10 apples + 4 apples - 5 apples  =  9 apples   So

10 tenths + 4 tenths - 5 tenths  =  9 tenths

$$\frac9{10}$$

.
Oct 25, 2017

#1
+7352
+2

$$1\frac25-\frac48$$

$$\frac48$$  is the same as  $$\frac12$$

=  $$1\frac25-\frac12$$

$$1\frac25$$  is the same as   $$1+\frac25$$

=  $$1+\frac25-\frac12$$

Now we need a common denominator. Multiply and divide  1  by  10 .

=  $$\frac{10}{10}+\frac25-\frac12$$

Multiply and divide  $$\frac25$$  by  2 .

=  $$\frac{10}{10}+\frac{2*2}{5*2}-\frac12$$

=  $$\frac{10}{10}+\frac{4}{10}-\frac12$$

Multiply and divide  $$\frac12$$  by  5 .

=  $$\frac{10}{10}+\frac{4}{10}-\frac{1*5}{2*5}$$

=  $$\frac{10}{10}+\frac{4}{10}-\frac{5}{10}$$

10 apples + 4 apples - 5 apples  =  9 apples   So

10 tenths + 4 tenths - 5 tenths  =  9 tenths

$$\frac9{10}$$

hectictar Oct 25, 2017