Whakaoti i te 22/5*1/4-3/8

$$2 \frac { 2 } { 5 } \times \frac { 1 } { 4 } - \frac { 3 } { 8 }$$

Aromātai

$$\frac{9}{40}=0.225$$

Ngā Upane Otinga

Whakareatia te 2 ki te 5, ka 10.

$$\frac{10+2}{5}\times \frac{1}{4}-\frac{3}{8}$$

Tāpirihia te 10 ki te 2, ka 12.

$$\frac{12}{5}\times \frac{1}{4}-\frac{3}{8}$$

Me whakarea te \frac{12}{5} ki te \frac{1}{4} mā te whakarea taurunga ki te taurunga me te tauraro ki te tauraro.

$$\frac{12\times 1}{5\times 4}-\frac{3}{8}$$

Mahia ngā whakarea i roto i te hautanga \frac{12\times 1}{5\times 4}.

$$\frac{12}{20}-\frac{3}{8}$$

Whakahekea te hautanga \frac{12}{20} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 4.

$$\frac{3}{5}-\frac{3}{8}$$

Ko te maha noa iti rawa atu o 5 me 8 ko 40. Me tahuri \frac{3}{5} me \frac{3}{8} ki te hautau me te tautūnga 40.

$$\frac{24}{40}-\frac{15}{40}$$

Tā te mea he rite te tauraro o \frac{24}{40} me \frac{15}{40}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{24-15}{40}$$

Tangohia te 15 i te 24, ka 9.

$$\frac{9}{40}$$

Tauwehe

$$\frac{3 ^ {2}}{2 ^ {3} \cdot 5} = 0.225$$