Pentomino Shikaku

Rules:divide the grid into rectangles.Every number should be contained in a rectangle of that area.No two numbers belong to the same rectangle.The remaining cells should be divided into all twelve different pentominos.Each cell with a circle belongs to a different pentomino.

Shikaku - easy

The easiest puzzle on this blog.
I think beginners would enjoy it anyway.

Rules: Divide the grid into non-overlapping rectangles,every rectangle containing exactly one numbered circle,the number indicating the area of the rectangle.

Dotted Shikaku

Rules: Divide the grid into rectangles that do not overlap.Each rectangle contains exactly one number which equals the area of the rectangle.Unnumbered dots do not contribute to the calculation of areas.

Shikaku

Rules: Divide the grid into rectangles,every rectangle containing exactly one numbered circle.The number is equal to the area of the rectangle.Rectangles do not overlap.

Edit: A modification in the puzzle.

shikaku:Find the pairs

Time for variation.This is my second attempt to draw more from shikaku.Here,the givens are struggling to find a place in the rectangles.Find a mate for them and send them in.

Rules:divide the grid into rectangles,every rectangle containing one or two numbers.The number itself or the sum of two numbers equal the area of the rectangle it/they belong to.