I. Calculation formula of quantitative relationship

Unit price × quantity = total price, single output × quantity = total output, speed× time = distance, work efficiency× time = total work, addend+addend = sum, one addend = and- another addend, minuend-subtree = difference, minuend = subtree+difference, factor.

Second, the geometric formula

1, square, square perimeter = side length× 4 formula: C=4a, square area = side length× side length formula: S=a×a, cube volume = side length× side length× side length formula: v = a× a× a.

2, rectangle, rectangle perimeter = (length+width) ×2 formula: C=(a+b)×2, rectangle area = length× width formula: S = a× b.

3, triangle, the area of the triangle = bottom × height ÷2 formula: S= a×h÷2.

4, parallelogram, parallelogram area = bottom × height formula: S = a× h.

5, trapezoidal, trapezoidal area = (upper bottom+lower bottom) × height ÷2 formula: S=(a+b)h÷2.

6. Circle, diameter = radius ×2 formula: d=2r, radius = diameter ÷2 formula: r= d÷2, circumference of circle = pi × diameter formula: c=πd =2πr, area of circle = radius × π formula: s = π r 2.

7. For a straight cylinder, the surface area of a cuboid = (length× width+length× height+width× height )× 2, the volume of a cuboid = bottom area× height = length× width× height, the surface area of a cube = side length× side length x6, the volume of a cube = side length× side length, and the side area of a cylinder = bottom circumference× height.

8. Cone, the total volume of the cone = bottom area × height × 1/3 Formula: V= 1/3Sh.