递等式计算.
27×(34+16)
144÷8×6
720﹣36×14
320+480÷16.
=27×50
=1350
②144÷8×6
=18×6
=108
③720﹣36×14
=720﹣504
=216
④320+480÷16
=320+30
=350
解方程x-13−x+26=2,去分母正确的是( )
— It is too noisy here. I can’t stand it.
— Me, too. We have to________ new ways to solve the problem.
国际上习惯用哪个经线圈作为东西半球的分界线