Whakaoti i te 10+(120-21*3+10-4)*2-3-[6*9-(80-18*4)*4]+18)+2=

$$10 + ( 120 - 21 \cdot 3 + 10 - 4 ) \cdot 2 - 3 - [ 6 \cdot 9 - ( 80 - 18 \cdot 4 ) \cdot 4 ] + 18 ) + 2 =$$

Aromātai

$$129$$

Ngā Upane Otinga

Whakareatia te 21 ki te 3, ka 63.

$$10+\left(120-63+10-4\right)\times 2-3-\left(6\times 9-\left(80-18\times 4\right)\times 4\right)+18$$

Tangohia te 63 i te 120, ka 57.

$$10+\left(57+10-4\right)\times 2-3-\left(6\times 9-\left(80-18\times 4\right)\times 4\right)+18$$

Tāpirihia te 57 ki te 10, ka 67.

$$10+\left(67-4\right)\times 2-3-\left(6\times 9-\left(80-18\times 4\right)\times 4\right)+18$$

Tangohia te 4 i te 67, ka 63.

$$10+63\times 2-3-\left(6\times 9-\left(80-18\times 4\right)\times 4\right)+18$$

Whakareatia te 63 ki te 2, ka 126.

$$10+126-3-\left(6\times 9-\left(80-18\times 4\right)\times 4\right)+18$$

Tāpirihia te 10 ki te 126, ka 136.

$$136-3-\left(6\times 9-\left(80-18\times 4\right)\times 4\right)+18$$

Tangohia te 3 i te 136, ka 133.

$$133-\left(6\times 9-\left(80-18\times 4\right)\times 4\right)+18$$

Whakareatia te 6 ki te 9, ka 54.

$$133-\left(54-\left(80-18\times 4\right)\times 4\right)+18$$

Whakareatia te 18 ki te 4, ka 72.

$$133-\left(54-\left(80-72\right)\times 4\right)+18$$

Tangohia te 72 i te 80, ka 8.

$$133-\left(54-8\times 4\right)+18$$

Whakareatia te 8 ki te 4, ka 32.

$$133-\left(54-32\right)+18$$

Tangohia te 32 i te 54, ka 22.

$$133-22+18$$

Tangohia te 22 i te 133, ka 111.

$$111+18$$

Tāpirihia te 111 ki te 18, ka 129.

$$129$$

Tauwehe

$$3\times 43$$