Tính :
a) \(\left(-37\right)+\left(-112\right)\)
b) \(\left(-42\right)+52\)
c) \(13-31\)
d) \(14-24-12\)
e) \(\left(-25\right)+30-15\)
Tính:
a) (-37) + (-112)
b) (-42) + 52
c) 13 - 31
d) 14 - 24 - 12
e) (-25) + 30 - 15
a) (–37 ) + (–112)
= –(37 + 112) (cộng hai số nguyên âm).
= –149.
b) (–42) + 52
= 52 – 42 (cộng hai số nguyên khác dấu)
= 10
c) 13 – 31 = –31 + 13 = – (31 – 13) = –18.
d) 14 – 24 – 12 = 14 – (24 + 12) = 14 – 36 = – (36 – 14) = –22.
e) (–25) + 30 – 15 = 30 – 25 – 15 = 30 – (25 + 15) = 30 – 40 = –10
bài 5; tính
a) (-37)+(-112)
b) -42+52
c)13-31
d) 14-24-12
e) (-25)+30-15
a. ( -37 ) + ( - 112 )
b. ( -42 ) + 52
c. 13 -31
d. 14 -24 -12
e. ( -25 ) + 30 -15
a. \(\left(-37\right)+\left(-112\right)=-149\)
b. \(\left(-42\right)+52=10\)
c. \(13-31=-18\)
d. \(14-24-12=-22\)
e. \(\left(-25\right)+30-15=-10\)
a. (−37)+(−112)=−149(−37)+(−112)=−149
b. (−42)+52=10(−42)+52=10
c. 13−31=−1813−31=−18
d. 14−24−12=−2214−24−12=−22
e. (−25)+30−15=−10
a. (-37) + ( -112)
= - (37+ 112)
= -149
b. ( -42 ) + 52
= 52 - 42
= 10
c. 13 -31
= - (31-13)
= -18
d. 14 - 24 -12
=(14 - 24) -12
= - (24 - 14 ) -12
= - 10 - 12
= - (10 +12)
= - 22
e.( -25 ) + 30 -15
= -25 + 15
= - (25- 15)
= - 10
hoặc:
= 30 -25 -15
= 5 -15
= -10
a)(-37)+(-112)
b)(-42)+52
c)13-31
d)14-24-12
e)(-25)+30-15
a)(-37)+(-112)
b)(-42)+52
c)13-31
d)14-24-12
e)(-25)+30-15
4.Tinh
a,\(\frac{4^{30}.3^{43}}{2^{53}.27^{15}}\)
b,\(\frac{\left(-27\right)^{10}.16^{25}}{6^{30}.\left(-32\right)^{15}}\)
c,\(\left(\frac{-2}{17}\right)^3.\left(\frac{-17}{35}\right)^3.\left(\frac{35}{3}\right)^3\)
d,\(\frac{3^{31}.25^8-9^{14}.5^{15}}{27^{10}.5^{15}-3^{30}.5^{17}}\)
e,\(2^{^2}+4^{^2}+6^2+..........+24^2\left(1^2+2^2+3^2+....+12^2=650\right)\)
1) (-6 - 2) . (-6 + 2)
2) 627 + 125 + (-627) + |-46| -21
3) (-25) + 30 + (-16) + 25 + (-4)
4) 75 - 5.(15 - 40) - (-60)
5) |31 - 17| - |15 - 52|
6) 13 - 18 - (-42) - 15
7) 369.4.[(- 5) + 4. (-8) ]
8) \(\left(-8\right)^3\) : \(\left(-8\right)^2\) + 8
9) 72 : (-6 . 2 + 4)
1) (-6 - 2) . (-6 + 2) = -8 . (-4) = 32
2) 627 + 125 + (-627) + |-46| -21 = 125 + 46 - 21 = 150
3) (-25) + 30 + (-16) + 25 + (-4) = 30 + (-20) = 10
4) 75 - 5.(15 - 40) - (-60) = 75 - 75 + 80 + 60 = 140
5) |31 - 17| - |15 - 52| = |14| - |-37| = 14 - 37 = -23
6) 13 - 18 - (-42) - 15 = 13 - 18 + 42 - 15 = 22
3 bài sau hết kiên nhẫn rồi, thông cảm nhé.
7) 369.4.[(- 5) + 4. (-8) ]
= 1476 . [(-5) + (-32)]
= 1476 . -37
= -54612
8) (−8)3 : (−8)2 + 8
= 8 + 8
= 16
9) 72 : (-6 . 2 + 4)
= 72 : (-12 + 4)
= 72 : (-8)
= -9
Thực hiện phép tính
a) 23 . 17 - 23 . 14
b) 80 - ( 4 . 5 - 3 . 23 )
c) 35 - { 12 - [ -14 + ( -2) }
d) 49 - ( -45) - 23
e) 13 - 18 - ( -42) - 15
g) -452 - ( -67 + 75 - 452 )
h) \(\left|31-17\right|-\left|13-52\right|\)
a) 23 . 17 - 23 . 14
= 23(17-14)
=23. 3= 24
b) 80 - ( 4 . 5 - 3 . 23 )
= 80- 22. (5-3.2)= 80- 22.(-1)
= 80- 4.(-1)= 80- (-4)= 84
c) 35 - { 12 - [ -14 + ( -2) }
= 35 - { 12 - (-16) }
=35- 28= 7
d) 49 - ( -45) - 23
= 94-23= 71
e) 13 - 18 - ( -42) - 15
= -5 -(-42) -15
= -20+42= 22
g) -452 - ( -67 + 75 - 452 )
= -452- (8-452)
= -452 -(- 444)= -8
h) |31−17|−|13−52|
= 14- 39= -25
a)23.17-23.14=23(17-14)=23.3=8.3=24
b)80-(4.5-3.23)=80-(20-3.8)=80+20+24=124
c) 35-{12-[-14+(-2)]}=35-12+14+-2=35
d) 49-(-45)-23=49+45-23=71
e)13-18--42-15=13-18+42-15=22
g)-452-(-67+75-452)=-452+67-75+452=67-75=-8
h)|31-17|-|13-52|=14-39=-25
Tính:
a) (-37) + (-112)
b) (-42) + 52
c) 13 - 31
d) 14 - 24 -12
e) (-25) + 30 -15
a) (-37) + (-112) = -149
b) (-42) + 52 = 10
c) 13 - 31 = -18
d) 14 - 24 -12 = -22
e) (-25) + 30 - 15 = -10
a) ( - 37 ) + ( - 112 ) = - 149
b ) ( - 42 ) + 52 = 10
c) 13 - 31 = -18
d) 14 - 24 - 12 = - 22
e) ( - 25 ) + 30 - 15 = - 20
a = -149
b = 10
c = -18
d = -22
e = -10
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