Quãng đường từ sân vận động Old Trafford ở thành phố manchester đến tháp đồng hồ Big Ben ở London là:

             1,609344. 200 = 322(km)

                      Đáp số : 322 km

(-0,25)⁵ : x = (-0,25)³

                  x = (-0,25)⁵ : (-0,25)³ 

               x = (-0,25)^5-3

                  x = (0,25)²

               x = 0,0625

a)0,75+\(\dfrac{9}{5}\)(1,5 -\(\dfrac{2}{3}\))² 

=\(\dfrac{1}{4}\)+\(\dfrac{9}{5}\)(\(\dfrac{3}{2}\)-\(\dfrac{2}{3}\))²

=\(\dfrac{5}{20}\)+\(\dfrac{36}{20}\)(\(\dfrac{9}{6}\)-\(\dfrac{4}{6}\))²

=\(\dfrac{41}{20}\)(\(\dfrac{5}{6}\))²

=\(\dfrac{41}{20}\).\(\dfrac{25}{36}\)

=\(\dfrac{205}{144}\)

b)\(\dfrac{-22}{25}\)+(\(\dfrac{22}{7}\)-0,12)

=\(\dfrac{-22}{25}\)+(\(\dfrac{22}{7}\)-\(\dfrac{3}{25}\))

=\(\dfrac{-22}{25}\)+(\(\dfrac{550}{175}\)-\(\dfrac{21}{175}\))

=\(\dfrac{-22}{25}\)+\(\dfrac{529}{175}\)

=\(\dfrac{-154}{175}\)+\(\dfrac{529}{175}\)

=\(\dfrac{375}{175}\)

=\(\dfrac{15}{7}\)

a)\(\dfrac{4}{9}\)+\(\dfrac{1}{4}\)=\(\dfrac{16}{36}\)+\(\dfrac{9}{36}\)=\(\dfrac{25}{36}\)