4 () 4 () 4 () 4 = 2 addition, subtraction, multiplication and division in brackets are OK. The result must be 2

4 () 4 () 4 () 4 = 2 addition, subtraction, multiplication and division in brackets are OK. The result must be 2

4 times 4 divided by (4 + 4)

The area of a parallelogram is 180 square centimeters. If the height is reduced to 1 / 10 of the original and the bottom is unchanged, the area of the parallelogram is ()

18 square centimeters

The area of a parallelogram is 5 square centimeters. If the bottom is expanded to 6 times of the original, and the height is reduced to 3 / 1 of the original, then

10

For a parallelogram, if the base is enlarged by 6 times and the height is reduced by 2 times, then the area of the parallelogram is smaller______ ．

Because the area of the parallelogram = base × height, if the base is enlarged by 6 times and the height is reduced by 2 times, then the area will be enlarged by 6 △ 2 = 3 times