Whakaoti i te 84*0.1+3*(-4*0.25+3^2)+4.1+2

$$84 \cdot 0.1 + 3 \cdot ( - 4 \cdot 0.25 + 3 ^ { 2 } ) + 4.1 + 2$$

Aromātai

$$38.5$$

Ngā Upane Otinga

Whakareatia te 84 ki te 0.1, ka 8.4.

$$8.4+3\left(-4\times 0.25+3^{2}\right)+4.1+2$$

Whakareatia te -4 ki te 0.25, ka -1.

$$8.4+3\left(-1+3^{2}\right)+4.1+2$$

Tātaihia te 3 mā te pū o 2, kia riro ko 9.

$$8.4+3\left(-1+9\right)+4.1+2$$

Tāpirihia te -1 ki te 9, ka 8.

$$8.4+3\times 8+4.1+2$$

Whakareatia te 3 ki te 8, ka 24.

$$8.4+24+4.1+2$$

Tāpirihia te 8.4 ki te 24, ka 32.4.

$$32.4+4.1+2$$

Tāpirihia te 32.4 ki te 4.1, ka 36.5.

$$36.5+2$$

Tāpirihia te 36.5 ki te 2, ka 38.5.

$$38.5$$

Tauwehe

$$\frac{7 \cdot 11}{2} = 38\frac{1}{2} = 38.5$$