Whakaoti i te -21/3*7-32/4*8+5*9/45

$$- \frac { 21 } { 3 \cdot 7 } - \frac { 32 } { 4 \cdot 8 } + \frac { 5 \cdot 9 } { 45 }$$

Aromātai

$$-1$$

Ngā Upane Otinga

Whakareatia te 3 ki te 7, ka 21.

$$-\frac{21}{21}-\frac{32}{4\times 8}+\frac{5\times 9}{45}$$

Whakawehea te 21 ki te 21, kia riro ko 1.

$$-1-\frac{32}{4\times 8}+\frac{5\times 9}{45}$$

Whakareatia te 4 ki te 8, ka 32.

$$-1-\frac{32}{32}+\frac{5\times 9}{45}$$

Whakawehea te 32 ki te 32, kia riro ko 1.

$$-1-1+\frac{5\times 9}{45}$$

Tangohia te 1 i te -1, ka -2.

$$-2+\frac{5\times 9}{45}$$

Whakareatia te 5 ki te 9, ka 45.

$$-2+\frac{45}{45}$$

Whakawehea te 45 ki te 45, kia riro ko 1.

$$-2+1$$

Tāpirihia te -2 ki te 1, ka -1.

$$-1$$

Tauwehe

$$-1$$