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a) 2763 + 152=2915
b) (-7) + (-14)=-21
c) (-35) + 35=0
d) (-5) + (-248)=-253
e) (-23) + 105=82
f) 78 + (-123)=-45
g) 23 + (-13)=10
h) (-23) + 13=-10
i) 26 + (-6)=20
j) 12 – 34=-22
k) -23 – 47=-70
l) 31 – (-23)=54
m) -9 – (-5)=-4
n) 6 – (8 – 17)=15
o) 19 + (23 – 33)=9
p) (-12 – 44) + (-3)=-59
q) 4 – (-15) –(-25)=44
r) -7 -14 – 26 –(-28)=-19
a) 2763 + 152 = 2915
b) Ta có : |–7| = 7; |–14| = 14.
Do đó: (–7) + (–14) = – ( |–7| + |–14| ) = – (7 + 14) = –21.
c) (–35) + (–9) = – (|–35| + |–9|) = – (35 + 9) = –44.
a/ 2763 + 152 = 2915
b/ (-7) + (-14) = -21
c/ (-35) + (-9) = -44
a) 2763 + 1522763 + 152
= 1 525 678
b) (-7) + (-14).(-7) + (-14)
= 77
c) (-35) + (-9).(-35) + (-9)
= 271
a) 2763 + 1522763 + 152
= 1 525 678
b) (-7) + (-14).(-7) + (-14)
= 77
c) (-35) + (-9).(-35) + (-9)
= 271
a) 2763 + 152 = 2915;
b) (-7) + (-14) = -21;
c) (-35) + (-9) = -44.
1) 2611
2)(-21)
3)(-44)
4)(-253)
5)82
6(-45)
7)10
8)(-10)
k mk nha
1)2763+152=2915
2)(-7)+(-14)=-21
3)(-35)+(-9)=-44
4)(-5)+(-248)=-253
5)(-23)+105=82
6)78+(-123)=-45
7)23+(-13)=10
8)(-23)+13=-10
2763 + 152 = 2915
( -5 ) + ( -14 ) = (-19 )
( -35 ) + ( -9 ) = ( -44 )
\(2763+152=2915\)
\(\left(-5\right)+\left(-14\right)=-19\)
\(\left(-35\right)+\left(-9\right)=-44\)
Tính:
a, 8.( -9/12 )
b, ( -14/5 ) . (-10)
c, 9. ( 4/-3 )
d, -15. ( -5/6 )
e, 13. ( -2/7 )
f, 7/26. ( -13 )
\(a,8.\left(\dfrac{-9}{12}\right)=\dfrac{8.\left(-9\right)}{12}=\dfrac{-72}{12}=-6\\ b,\left(\dfrac{-14}{5}\right).\left(-10\right)=\dfrac{\left(-14\right).\left(-10\right)}{5}=\dfrac{140}{5}=28\\ c,9.\left(\dfrac{4}{-3}\right)=\dfrac{9.\left(-4\right)}{3}=\dfrac{-36}{3}=-12\\ d,-15.\left(\dfrac{-5}{6}\right)=\dfrac{\left(-15\right).\left(-5\right)}{6}=\dfrac{75}{6}\\ e,13.\left(\dfrac{-2}{7}\right)=\dfrac{13.\left(-2\right)}{7}=\dfrac{-26}{7}\\ f,\dfrac{7}{26}.\left(-13\right)=\dfrac{7.\left(-13\right)}{26}=\dfrac{-91}{26}\)
a, 8.( -9/12 )=-6
b, ( -14/5 ) . (-10)=28
c, 9. ( 4/-3 )=-12
d, -15. ( -5/6 )=25/2
e, 13. ( -2/7 )-36/7
f, 7/26. ( -13 )=-7/2
A)2915
B)-21
C)-44
a) 2763+152=2915
b) (-7)+(-14)=(-21)
c)(-35)+(-9)=(-44)