(-50+19+143)-(-79+25+48)
tính : (-50+19-143) - (-79+25+48)
[-50+19+143]-[-79+25+48]=
[-50+19+143]-[-79+25+48]=118
tinh
(-50 + 19 + 143) – (-79 + 25 + 48)
(-50+19+143)-(79+25+48) giúp mình với
\(\left(-50+19+143\right)-\left(79+25+48\right)\)
\(=-50+19+143-79-25-48\)
\(=-31+143-79-25-48\)
\(=112-79-25-48\)
\(=33-25-48\)
\(=8-48\)
\(=-40\)
\(\left(-50+19+143\right)-\left(79+25+48\right)\)
\(=-50+19+143-79-25-48\)
\(=-34+64-\left(-23\right)\)
\(=53\)
hok tốt
tinh nhanh:
(-50 + 19 + 143) - (-79 + 25 +48)
Bài 2: Tính
c; (-50 + 19+ 143) - (-79 + 25 + 48)
\(\left(-50+19+143\right)-\left(-79+25+48\right)\\ =112-\left(-6\right)\\ =112+6\\ =118\)
=-50+19+143+79-25-48
=143-75+98-48
=143-75+50
=143-25
=118
5. (-3)2-14. (-8) + (-40)
(-50+19+143)-(-79+25+48)
a) 5*(-3^2)-14*(-8)+(-40)=5*9-(-48)+(-40)=45+48-40=53
b)(-50+19+143)-(-79+25+48)=-50+19+143+79-25-48=218
tinh nhanh
3) (187 -23) – (20 – 180)
4) (-37 – 17). (-9) + 35. (-9 – 11)
5) (-50 +19 +143) – (-79 + 25 + 48)
6) (-8).25.(-2). 4. (-5).125
7) 3784 + 23 – 3785 – 15
7: =-1+8=7
6: \(=-\left(8\cdot125\right)\cdot\left(2\cdot5\right)\cdot\left(25\cdot4\right)=-1000000\)
5: =-50+19+143+79-25-48
=-75+98+95
=23+95
=118
4: =37x9+17x9-35x9-35x11
=18+153-385
=-214
tinh nhanh
3) (187 -23) – (20 – 180)
4) (-37 – 17). (-9) + 35. (-9 – 11)
5) (-50 +19 +143) – (-79 + 25 + 48)
6) (-8).25.(-2). 4. (-5).125
7) 3784 + 23 – 3785 – 15
3: =187-23-20+180
=367-43
=324
4: \(=37\cdot9+17\cdot9-35\cdot9-35\cdot11=19\cdot9-385\)
\(=171-385=-214\)
5: =-50+19+143+79-25-48
=-75+94+95
=20+94
=114
3 ; 324
4 ; -214
5 ; 118
6 ; - 1 000 000
7 ; 7
học tốt