Method18 *1= 66+(23-18) =11will do.

It is known that the bottom of a cylinder is equal to the ground of a cone, and the volume is constant whether it is upside down or upside down.

18 is the height of the cone. When the cone is inverted into a cylinder, the height of the cylinder with the same bottom area is higher than that of the cone, and the height of the cylinder is only one third of that of the cone. So 18 * one third is the height of the cone upside down, and the height of the cylinder is 1 1.

I'm in grade six, too. We have reached page 19. Come on, this question is right, and so is Huanggang's answer.

Ask me next time if you don't understand Huanggang.