Whakaoti i te 21div8+2-12*3=

$$21 \div 8 + 2 - 12 \times 3 =$$

Aromātai

$$-\frac{251}{8}=-31.375$$

Ngā Upane Otinga

Me tahuri te 2 ki te hautau \frac{16}{8}.

$$\frac{21}{8}+\frac{16}{8}-12\times 3$$

Tā te mea he rite te tauraro o \frac{21}{8} me \frac{16}{8}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$\frac{21+16}{8}-12\times 3$$

Tāpirihia te 21 ki te 16, ka 37.

$$\frac{37}{8}-12\times 3$$

Whakareatia te 12 ki te 3, ka 36.

$$\frac{37}{8}-36$$

Me tahuri te 36 ki te hautau \frac{288}{8}.

$$\frac{37}{8}-\frac{288}{8}$$

Tā te mea he rite te tauraro o \frac{37}{8} me \frac{288}{8}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{37-288}{8}$$

Tangohia te 288 i te 37, ka -251.

$$-\frac{251}{8}$$

Tauwehe

$$-\frac{251}{8} = -31\frac{3}{8} = -31.375$$