Question

10/9×12/13,加7/9÷13/12,减12/13怎么算？

Answer 1

解：10/9×12/13加7/9÷13/12减12/13等于（ 32/39 ）
∵已知需求出10/9×12/13加7/9÷13/12减12/13等于多少
∴10/9×12/13加7/9÷13/12减12/13
= 10/9 ×12/13 + 7/9 × 12/13 - 12/13
= 12/13 × （10/9 + 7/9 - 1）
= 12/13 × （17/9 - 9/9）
= 12/13 × 8/9
= 32/39
答：10/9×12/13加7/9÷13/12减12/13等于32/39

Answer 2

10/9×12/13+7/9÷13/12-12/13
=10/9×12/13+7/9×12/13-1×12/13
=12/13×(10/9+7/9-1)
=12/13×8/9
=32/39

Answer 3

10/9×12/13+7/9÷13/12-12/13
=10/9×12/13+7/9×12/13-1×12/13
=(10/9+7/9-1)×12/13
=8/9×12/13
=32/39