"390除以77等于几"...390除以77等于几

　"390+30除以7等于几"...390+30除以7等于几

　"394除以70等于几"...394除以70等于几

　"370除以39等于多少"...370除以39等于多少

　"390除以7+53等于几"...390除以7+53等于几

　"390除以760"...390除以760

　"390除以71等于几"...390除以71等于几

　"390除以760等于几"...390除以760等于几

　"390除以780等于几"...390除以780等于几

　"390除以75等于几"...390除以75等于几