tớ Đố bạn câu này 97,5-865=?????

= 1089 nha

địt mẹ mày

a, (-25) .68 + (-34).(-250)

= -1700 + 8500

= 6800

b, 7.5 + 9 . [(-3) - (-27)]

= 16.5 . 24

= 396

mk cũng đang cân bn

 nào trả lời nhanh mk tích cho

\(\frac{3^6.45^4-15^{13}.5^{-9}}{27^4.25^3+45^6}\)=\(\frac{3^6.3^8.5^4-5^{13}.3^{13}.5^{-9}}{3^{12}.5^6+3^{12}.5^6}\)=\(\frac{3^{14}.5^4-5^4.3^{13}}{3^{12}.5^6+3^{12}.5^6}\)=\(\frac{3.1.}{1.5^2.}\)=\(\frac{3}{25}\)

Học tốt

\(a,=\dfrac{3^6\cdot5^4\cdot9^4-5^{13}\cdot3^{13}\cdot5^{-9}}{3^{12}\cdot5^6+9^6\cdot5^6}=\dfrac{3^{14}\cdot5^4-5^4\cdot3^{13}}{3^{12}\cdot5^6+3^{12}\cdot5^6}\\ =\dfrac{3^{13}\cdot5^4\cdot2}{2\cdot3^{12}\cdot5^6}=\dfrac{3}{5^2}=\dfrac{3}{25}\)

\(b,=\dfrac{\left(\dfrac{2}{5}\cdot5\right)^7+\left(\dfrac{9}{4}\cdot\dfrac{16}{3}\right)^3}{2^7\cdot5^2+2^9}=\dfrac{2^7+12^3}{2^7\left(5^2+2^2\right)}=\dfrac{2^7+4^3\cdot3^3}{2^7\cdot29}=\dfrac{2^6\left(2+3^3\right)}{2^7\cdot29}=\dfrac{1}{2}\)

a) \(\dfrac{3^6\cdot3^8\cdot5^4-5^{13}\cdot3^{13}\cdot5^{-9}}{3^{12}\cdot5^6+3^{12}\cdot5^6}=\dfrac{3^{14}\cdot5^4-3^{13}\cdot5^4}{3^{12}\cdot5^6\cdot2}=\dfrac{3^{12}\cdot5^4\left(3^2-3\right)}{3^{12}\cdot5^6\cdot2}=\dfrac{3^2-3}{5^2\cdot2}=\dfrac{6}{50}=\dfrac{3}{25}\)

a) -175 - ( -7 . 5^2 + 4 . 2^3)

= -175 - ( -175 + 32 )

= -175 - -175 +32

= 0 +32

= 32

b) (-27) + 20 + (-9) + 27 + (-11)

= (-27 + 27 ) + 20 + (-11) + (- 9)

= 0 + 9 + (-9)

= 0 + 0

= 0

                                         \(A=\)\(\frac{6}{7}+\frac{1}{7}\times\frac{2}{7}+\frac{1}{7}\times\frac{5}{7}=\frac{6}{7}+\frac{1}{7}\left(\frac{2}{7}+\frac{5}{7}\right)\)

                                                                                                            \(=\frac{6}{7}+\frac{1}{7}\times1\)

                                                                                                            \(=\frac{6}{7}+\frac{1}{7}\)

                                                                                                             \(=1\)

 Cách 1:                                                      \(B=\frac{4}{9}\times\frac{13}{3}-\frac{4}{3}\times\frac{40}{9}\)

                                                                      \(=\frac{52}{27}-\frac{160}{27}\)

                                                                      \(=-4\)

K cho mk nhé thks bn nhiều

~CHÚC BẠN HỌC TỐT~

A=6/7+1/7(2/7+5/7)

 =6/7+1/7.1

 =6/7+1/7

 =1

A=6/7+1/7.2/7+1/7.5/7

A=6/7+1/7.(2/7+5/7)

A=6/7+1/7.7/7

A=6/7+1/7.1

A=7/7=1

B=4/9.13/3-4/3.4/9

B=4/9.(13/3-4/3)

B=4/9.9/3

B=4/9.3

B=12/9