Whakaoti i te 12div3/5-(-17/10)=

$$12 \div \frac { 3 } { 5 } - ( - 1 \frac { 7 } { 10 } ) =$$

Aromātai

$$\frac{217}{10}=21.7$$

Ngā Upane Otinga

Whakawehe 12 ki te \frac{3}{5} mā te whakarea 12 ki te tau huripoki o \frac{3}{5}.

$$12\times \frac{5}{3}-\left(-\frac{1\times 10+7}{10}\right)$$

Tuhia te 12\times \frac{5}{3} hei hautanga kotahi.

$$\frac{12\times 5}{3}-\left(-\frac{1\times 10+7}{10}\right)$$

Whakareatia te 12 ki te 5, ka 60.

$$\frac{60}{3}-\left(-\frac{1\times 10+7}{10}\right)$$

Whakawehea te 60 ki te 3, kia riro ko 20.

$$20-\left(-\frac{1\times 10+7}{10}\right)$$

Whakareatia te 1 ki te 10, ka 10.

$$20-\left(-\frac{10+7}{10}\right)$$

Tāpirihia te 10 ki te 7, ka 17.

$$20-\left(-\frac{17}{10}\right)$$

Ko te tauaro o -\frac{17}{10} ko \frac{17}{10}.

$$20+\frac{17}{10}$$

Me tahuri te 20 ki te hautau \frac{200}{10}.

$$\frac{200}{10}+\frac{17}{10}$$

Tā te mea he rite te tauraro o \frac{200}{10} me \frac{17}{10}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$\frac{200+17}{10}$$

Tāpirihia te 200 ki te 17, ka 217.

$$\frac{217}{10}$$

Tauwehe

$$\frac{7 \cdot 31}{2 \cdot 5} = 21\frac{7}{10} = 21.7$$