cách khắc phục

không xả rác bừa bãi

không đốt rừng

là

3

a) \(\frac{11}{24} - \frac{5}{41} + \frac{13}{24} + 0 , 5 - \frac{36}{41}\)

= (11/24 + 13/24) - (5/41 + 36/41) + 0,5

= 1 - 1 + 0,5

= 0,5

b) \(\frac{1}{2} \cdot \frac{3}{4} + \frac{1}{2} \cdot \frac{1}{4} + \frac{1}{2}\)

= 1/2 . (3/4 + 1/4) + 1/2

= 1/2 . 1 + 1/2

= 1/2 + 1/2

= 1

c) \(\left(\right. \frac{- 3}{4} \left.\right)^{2} : \left(\right. \frac{- 1}{4} \left.\right)^{2} + 9 \cdot \left(\right. \frac{- 1}{9} \left.\right) + \left(\right. \frac{- 3}{2} \left.\right)\)

= 9/16 : 1/16 - 1 - 3/2

= 9 - 1 - 3/2

= 8 - 3/2

= 13/2

d) \(\sqrt{0 , 25} \cdot \left(\right. - 3 \left.\right)^{3} - \sqrt{\frac{1}{81}} : \left(\right. \frac{- 1}{3} \left.\right)^{3}\)

= 1/2 . (- 27) - 1/9 : ( - 1 / 27 )
= -27/2 + 3

= -21/2