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G
24 tháng 11 2021
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
6 tháng 2 2020
( -2007 ) - ( 12 - 2007 )
= -2007 - 12 + 2007
= ( -2007 + 2007 ) -12
= 0 -12
= -12
( 28 + 39 ) + ( 168 - 28 - 39 )
= 28 + 39 + 168 - 28 - 39
= ( 28 - 28 ) + ( 39 - 39 ) + 168
= 0 + 0 + 168
= 168
( 23 - 145 + 59 ) - ( 23 + 59 )
= 23 - 145 + 59 - 23 - 59
= ( 23 - 23 ) + ( 59 - 59 ) -145
= 0 + 0 - 145
= -145
( -23 ) - ( 77 + 1000 )
= -23 - 77 + 1000
= ( -23 -77 ) + 1000
= -1000 + 1000
= 0
( 427 - 2019 ) - ( 27 - 2019 )
= 427 - 2019 - 27 + 2019
= ( 427 - 27 ) - ( 2019 - 2019 )
= 400 - 0
= 400
Bạn k cho mk nha !!!
M
25 tháng 11 2021
d) ( - 15 ) - 23 + ( - 85 ) - 77
= ( - 15 - 85 ) - ( 23 + 77 )
= - 100 - 100
= - 200
e) ( 123 - 37 ) - 123
= ( 123 - 123 ) - 37
= 0 - 37
= - 37
f) ( - 224 ) - ( 34 - 224 )
= ( - 224 + 224 ) - 34
= 0 - 34
= - 34
g) 126 - ( 126 - 33 )
= ( 126 - 126 ) - 33
= 0 - 33
= - 33
h) ( - 53 - 23 ) - ( 567 - 53 )
= ( - 53 + 53 ) + ( - 23 - 567 )
= 0 - 590
= - 590
G
25 tháng 11 2021
d) ( - 15 ) - 23 + ( - 85 ) - 77
= ( - 15 - 85 ) - ( 23 + 77 )
= - 100 - 100
= - 200
e) ( 123 - 37 ) - 123
= ( 123 - 123 ) - 37
= 0 - 37
= - 37
f) ( - 224 ) - ( 34 - 224 )
= ( - 224 + 224 ) - 34
= 0 - 34
= - 34
g) 126 - ( 126 - 33 )
= ( 126 - 126 ) - 33
= 0 - 33
= - 33
h) ( - 53 - 23 ) - ( 567 - 53 )
= ( - 53 + 53 ) + ( - 23 - 567 )
= 0 - 590
= - 590
14 tháng 12 2021
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]}: 13
= [8 + (1 +
)] : 13
= [8 + (1 + 4)] : 13
= (8 + 5) : 13= 13 : 13 = 1
DH
4
NT
0
CN
4
0 nhé bạn
(-23) + 23 = 0