rút gọn phân số 3^2.5^2+15.7/22.6+18.11 câu b (-4).35+(-5).11/7.(-25)+2.(-15) GIÚP MÌNH VỚI 10/08/2021 Bởi Iris rút gọn phân số 3^2.5^2+15.7/22.6+18.11 câu b (-4).35+(-5).11/7.(-25)+2.(-15) GIÚP MÌNH VỚI
a) $3^{2}$.$5^{2}$+$\frac{15.7}{22.6}$+$\frac{18}{11}$ = 9.25+$\frac{105}{132}$+$\frac{18}{11}$ = 9.25+$\frac{35}{44}$+$\frac{18}{11}$ = 225+$\frac{35}{44}$+$\frac{18}{11}$ = $\frac{225}{1}$+$\frac{35}{44}$+$\frac{18}{11}$ = $\frac{9900}{44}$+$\frac{35}{44}$+$\frac{72}{44}$ = $\frac{10007}{44}$ b) (-4).35+(-5).$\frac{11}{7}$.(-25)+2.(-15) = -140+$\frac{-55}{7}$.(-55) = $\frac{-140}{1}$+$\frac{-385}{1}$.$\frac{-55}{1}$ = $\frac{-140}{1}$+$\frac{21175}{1}$ = 21035 Bình luận
`(3^2 .5^2 +15.7)/(22.6+18.11)` `=((3.5)^2 +15.7)/(2.11.6+18.11)` `=(15^2 +15.7)/(12.11+18.11)` `=((15+7).15)/((12+18).11)` `=(22.15)/(30.11)` `=(2.11.15)/(2.15.11)` `=1` `b) ((-4).35+(-5).11)/(7.(-25)+2.(-15)` `=((-4).7.5+(-5).11)/(7.(-5).5+2.3.(-5)` `=((-28).5+(-5).11)/(35.(-5)+6.(-5))` `=(28.(-5)+(-5).11)/(35.(-5)+6.(-5))` `=((28+11).(-5))/((-5).(35+6))` `=(39.(-5))/((-5).41)` `=39/41` chúc học tốt Bình luận
a) $3^{2}$.$5^{2}$+$\frac{15.7}{22.6}$+$\frac{18}{11}$
= 9.25+$\frac{105}{132}$+$\frac{18}{11}$
= 9.25+$\frac{35}{44}$+$\frac{18}{11}$
= 225+$\frac{35}{44}$+$\frac{18}{11}$
= $\frac{225}{1}$+$\frac{35}{44}$+$\frac{18}{11}$
= $\frac{9900}{44}$+$\frac{35}{44}$+$\frac{72}{44}$
= $\frac{10007}{44}$
b) (-4).35+(-5).$\frac{11}{7}$.(-25)+2.(-15)
= -140+$\frac{-55}{7}$.(-55)
= $\frac{-140}{1}$+$\frac{-385}{1}$.$\frac{-55}{1}$
= $\frac{-140}{1}$+$\frac{21175}{1}$
= 21035
`(3^2 .5^2 +15.7)/(22.6+18.11)`
`=((3.5)^2 +15.7)/(2.11.6+18.11)`
`=(15^2 +15.7)/(12.11+18.11)`
`=((15+7).15)/((12+18).11)`
`=(22.15)/(30.11)`
`=(2.11.15)/(2.15.11)`
`=1`
`b) ((-4).35+(-5).11)/(7.(-25)+2.(-15)`
`=((-4).7.5+(-5).11)/(7.(-5).5+2.3.(-5)`
`=((-28).5+(-5).11)/(35.(-5)+6.(-5))`
`=(28.(-5)+(-5).11)/(35.(-5)+6.(-5))`
`=((28+11).(-5))/((-5).(35+6))`
`=(39.(-5))/((-5).41)`
`=39/41`
chúc học tốt