(遂昌县)用递等式计算.①[1﹣(+)]×36②(+)×36③7.5×4.7+4.7×2.5④25.3×12﹣33.46÷0.35⑤×[÷(1﹣)]⑥+(﹣)÷.
竖式计算:
竖式计算: 315×3= 375×4=
竖式计算: 708×2= 280×4=