The value of 1+2+3+...+30+31+30+29+...+3+2+1 =?

Find the square root of 0.000625 and express it as a fraction.

0.007 × 0.005 = ?

83 + (82 - 3) - 12 + 61 - 54 + 98 - 11 = ?

$$\sqrt{0.25} - \sqrt[3]{0.008} + \sqrt{0.36} + \sqrt[4]{0.0256}$$ = ?

78 + 25 × 2 - (36 ÷ 3) + 44 - 17 + 11 = ?

45 + 68 - (25 + 17) + 96 × 2 - 48 = ?

There are 540 students in a school. One-third of them are girls. Three-fifth of the number of boys are players and one-fourth of the girls are players. Total number of players in the school is

44444444 ÷ 44 =

77 ÷ 0.007 =