It's simple, the total area minus the swimming pool area in the middle.

5.(2+ 10)× 12÷2-3×4÷2-(4+6)×4÷2

It looks complicated, but it's not complicated at all. Find the trapezoidal area on the left and subtract the δ and trapezoidal area of the vacancy.

Other questions are not listed:

Question 6: Think of the signboard as a rectangle plus a triangle, find out their areas and add them up.

The title is triangle+rectangle+trapezoid. Find out their areas and add them.

Because the point of green grass (four triangles) is the midpoint of the length and width of a big rectangle, it can be seen that green grass is half of the total area, that is, the total area ÷2, and yellow flowers and red flowers are half of the total area, that is, the total area ÷2.

26.4x+ 18x=66.6

Solution: (26.4+ 18) x = 66.6.

44.4 times =66.6

x=66.6÷44.4

X is equal to 1.5 (note the equal sign alignment).

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