0,26加上0.4的和,乘以9除0.81的商,积是多少?

---

(0.26+0.4)×(0.81÷9)
=0.66×0.09
=0.0594

---

（0.26+0.4）X(0.81÷9)
=0.66X0.09
=0.0594

---