Whakaoti i te -81/8+-31/20+7/10=

$$- 8 \frac { 1 } { 8 } + - 3 \frac { 1 } { 20 } + \frac { 7 } { 10 } =$$

Aromātai

$$-\frac{419}{40}=-10.475$$

Ngā Upane Otinga

Whakareatia te 8 ki te 8, ka 64.

$$-\frac{64+1}{8}-\frac{3\times 20+1}{20}+\frac{7}{10}$$

Tāpirihia te 64 ki te 1, ka 65.

$$-\frac{65}{8}-\frac{3\times 20+1}{20}+\frac{7}{10}$$

Whakareatia te 3 ki te 20, ka 60.

$$-\frac{65}{8}-\frac{60+1}{20}+\frac{7}{10}$$

Tāpirihia te 60 ki te 1, ka 61.

$$-\frac{65}{8}-\frac{61}{20}+\frac{7}{10}$$

Ko te maha noa iti rawa atu o 8 me 20 ko 40. Me tahuri -\frac{65}{8} me \frac{61}{20} ki te hautau me te tautūnga 40.

$$-\frac{325}{40}-\frac{122}{40}+\frac{7}{10}$$

Tā te mea he rite te tauraro o -\frac{325}{40} me \frac{122}{40}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{-325-122}{40}+\frac{7}{10}$$

Tangohia te 122 i te -325, ka -447.

$$-\frac{447}{40}+\frac{7}{10}$$

Ko te maha noa iti rawa atu o 40 me 10 ko 40. Me tahuri -\frac{447}{40} me \frac{7}{10} ki te hautau me te tautūnga 40.

$$-\frac{447}{40}+\frac{28}{40}$$

Tā te mea he rite te tauraro o -\frac{447}{40} me \frac{28}{40}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$\frac{-447+28}{40}$$

Tāpirihia te -447 ki te 28, ka -419.

$$-\frac{419}{40}$$

Tauwehe

$$-\frac{419}{40} = -10\frac{19}{40} = -10.475$$