Tính 43 : 4 * 24 - 23 + 6
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`@` `\text {Ans}`
`\downarrow`
`4.`
`a)`
\((-35) + 23 – (-35) – 47\)
`= (-35) + 23 + 35 - 47`
`= (-35 + 35) + (23 - 47)`
`= -24`
`b)`
\( 24 – (-136) – (-70) + 15 + (-115)\)
`= 24 + 136 + 70 + 15 - 115`
`= (24+136) + 70 + (-115 + 15)`
`= 160 + 70 - 100`
`= 160 - 30`
`= 130`
`c)`
\(37 – (-43) + (-85) – (-30) + 15\)
`= 37 + 43 - 85 + 30 + 15`
`= (37+43) + 30 - (85 - 15)`
`= 80 + 30 - 70`
`= 110 - 70`
`= 40`
A. -14 - 7 - 12 - 24
= - 21 - 12 - 24
= - 33 - 24
= - 57
B. -10 - 14 - 16 + 43
= - 24 - 16 + 43
= - 40 + 43
= - 83
C. 32 + |-23| - 57 - (-23)
= 32 + 23 - 57 +23
= 55 - 57 + 23
= - 2 + 23
= 21
D. |-8| + |-4| - (-12) + 5
= 8 + 4 + 12 + 5
= 12 + 12 + 5
= 24 + 5
= 29
E. |-13| - |-17| + (-20) - (-18)
= 13 - 17 - 20 + 18
= - 4 - 17 - 20 + 18
= - 21 - 20 + 18
= - 41 + 18
= 23
A. -14-7-12-24=-21-36=-57
B. -10-14-16+43=-24+27=3
C.32+\(^{|-23|}\)-57-(-23)=32+23-57+23=55-80=-25
D.\(|-8|+|-4|\)-(-12)+5=8+4+12+5=12+17=29
E.\(|-13|-|-17|\)+(-20)-(-18)=13-17-20+18=-4-2=-6
d=43/37d=43/37 × 23/15−43/3723/15−43/37 × 8/15+31/378/15+31/37
=43/37=43/37 x 23/15+43/3723/15+43/37 x (−8/15)+31/37(−8/15)+31/37
=43/37(23/15−8/15)+31/37=43/37(23/15−8/15)+31/37
=43/37.1+31/37=43/37.1+31/37
=2=2
E=−5/24E=−5/24 × 9/11−5/249/11−5/24 × 2/11+7/122/11+7/12
=−5/24(9/11+2/11)+7/12=−5/24(9/11+2/11)+7/12
=−5/24.1+7/12=−5/24.1+7/12
=3/8=3/8
a)3/7–−11/14−7/3×6/7a)3/7–−11/14−7/3×6/7
=3/7−−11/14−2=3/7−−11/14−2
=3/7+11/14−2=3/7+11/14−2
=−11/14=−11/14
b)6/5:3/2+−2/3×9/14b)6/5:3/2+−2/3×9/14
=4/5−3/7=4/5−3/7
=13/35
d=43/37d=43/37 × 23/15−43/3723/15−43/37 × 8/15+31/378/15+31/37
=43/37=43/37 x 23/15+43/3723/15+43/37 x (−8/15)+31/37(−8/15)+31/37
=43/37(23/15−8/15)+31/37=43/37(23/15−8/15)+31/37
=43/37.1+31/37=43/37.1+31/37
=2=2
E=−5/24E=−5/24 × 9/11−5/249/11−5/24 × 2/11+7/122/11+7/12
=−5/24(9/11+2/11)+7/12=−5/24(9/11+2/11)+7/12
=−5/24.1+7/12=−5/24.1+7/12
=3/8=3/8
a)3/7–−11/14−7/3×6/7a)3/7–−11/14−7/3×6/7
=3/7−−11/14−2=3/7−−11/14−2
=3/7+11/14−2=3/7+11/14−2
=−11/14=−11/14
b)6/5:3/2+−2/3×9/14b)6/5:3/2+−2/3×9/14
=4/5−3/7=4/5−3/7
=13/35
1) (-25).8.(-4).(-125)
= [(-25).4].[(-125).8]
=(-100).(-1000)
=100000
2)30.(5-10)
=30.5-30.10
=30.5-300
=150-300
=(-150)
3) 43.(53-81)+53.(81-43)
=43.53-43.81+53.81-53.43
=(43.53-53.43)+(43.81-53.81)
=0+81.(43-53)
=(-810)
4) Mk chưa biết làm nha
1) (-25).8.(-4).(-125)
= [ (-25) . (-4) ] . [ 8 . (-125) ]
= 100 . (-1000)
= -100 000
2) 30.(-5-10)
= 30 . (-15)
= -450
3) 43.(53-81)+53.(81-43)
= 43 . 53 - 43 . 81 + 53 . 81 - 53.43
= -43 . 81 + 53 . 81
= 81 . ( -43 + 53)
= 81 . 10
= 810
4) (-6)².(-17)+23.(-36)-72.30
= 36 . (-17) + 23 . (-36) - 72. 30
= (-36) . 17 + 23 . (-36) - 72 . 30
= (-36) . ( 17 + 23 ) - 72 . 30
= (-36) . 40 - 72.30
= (-1440 )- 2160
= -3600
# HOK TỐT #
1) 271 - [ - 43 - ( - 271 - 17 )]
= 271 - [ - 43 + 271 + 17 ]
=271+43-271-17
=43-17
=26
2) 6 - 24 - 24 + 48 + 4
=10+48-48
=10
1)\(217-\left[-43-\left(-271-17\right)\right]\\ =217-\left(-43+271+17\right)\\ =217+43-271-17\\ =43-17=26\)
2)\(6-24-24+48+4=6+4=10\)
\(=4^3:4.2^4-2^3+6\\ =4^2.2^4-2^3+6\\ =16.16-8+6\\ =256-8+6=254\)
254 nha chúc bạn học tốt