①(360﹣129)÷11
②276﹣165+22
③4×23×5
④15×(367﹣259)
⑤720÷4÷9
⑥135+89+65
=231÷11
=21
=111+22
=133
=4×5×23
=20×23
=460
=15×108
=1620
=720÷9÷4
=80÷4
=20
=
山脉构成了地形的骨架,下面图示正确的是( )