Whakaoti i te 31/4-23/7=-1

$$3 \frac { 1 } { 4 } - 2 \frac { 3 } { 7 } = - 1$$

Manatoko

Ngā Upane Otinga

Me whakarea ngā taha e rua o te whārite ki te 28, arā, te tauraro pātahi he tino iti rawa te kitea o 4,7.

$$7\left(3\times 4+1\right)-4\left(2\times 7+3\right)=-28$$

Whakareatia te 3 ki te 4, ka 12.

$$7\left(12+1\right)-4\left(2\times 7+3\right)=-28$$

Tāpirihia te 12 ki te 1, ka 13.

$$7\times 13-4\left(2\times 7+3\right)=-28$$

Whakareatia te 7 ki te 13, ka 91.

$$91-4\left(2\times 7+3\right)=-28$$

Whakareatia te 2 ki te 7, ka 14.

$$91-4\left(14+3\right)=-28$$

Tāpirihia te 14 ki te 3, ka 17.

$$91-4\times 17=-28$$

Whakareatia te -4 ki te 17, ka -68.

$$91-68=-28$$

Tangohia te 68 i te 91, ka 23.

$$23=-28$$

Whakatauritea te 23 me te -28.

$$\text{false}$$