Comparative size: 5/6 points? 70 minutes 5/6 square meters? Answer: 5/6 is less than 70. 5/6 is less than 70.
The rectangle is 4/ 1m long and 6/ 1m wide. What is the circumference of this rectangle? What is the area? Answer: The circumference is 4 * 2+6 * 2 = 20m, and the area is 4 * 6 = 24m2.
Use "5/2,3/1,30,2.4" and "+-×" once to list and try. You can add parentheses to maximize the result and find the maximum value. The maximum value of (30-5/2)X(2.4+3) is 1650/4.