Whakaoti i te 2{4[7+4(5*3-9)]-2(40-8)}=

$$2 \{ 4 [ 7 + 4 ( 5 \cdot 3 - 9 ) ] - 2 ( 40 - 8 ) \} =$$

Aromātai

$$120$$

Ngā Upane Otinga

Whakareatia te 5 ki te 3, ka 15.

$$2\left(4\left(7+4\left(15-9\right)\right)-2\left(40-8\right)\right)$$

Tangohia te 9 i te 15, ka 6.

$$2\left(4\left(7+4\times 6\right)-2\left(40-8\right)\right)$$

Whakareatia te 4 ki te 6, ka 24.

$$2\left(4\left(7+24\right)-2\left(40-8\right)\right)$$

Tāpirihia te 7 ki te 24, ka 31.

$$2\left(4\times 31-2\left(40-8\right)\right)$$

Whakareatia te 4 ki te 31, ka 124.

$$2\left(124-2\left(40-8\right)\right)$$

Tangohia te 8 i te 40, ka 32.

$$2\left(124-2\times 32\right)$$

Whakareatia te 2 ki te 32, ka 64.

$$2\left(124-64\right)$$

Tangohia te 64 i te 124, ka 60.

$$2\times 60$$

Whakareatia te 2 ki te 60, ka 120.

$$120$$

Tauwehe

$$2^{3}\times 3\times 5$$