M = 12 - ( - 5 ) N = ( -3 ) - 20
M = 17 N = -23
=> M > N
nha bn
M = 12 - (15 - 20) = 12 - (-5) = 17
N = 12 - 15 - 20 = (-3) - 20 = -23
Vậy M > N
M=12-(15-20)
=12-(-5)
=12+5
=7
N=12-15-20
=-3-20
=-23
VI 7>-23
=>M>N
K NHE
\(\Rightarrow M=12-\left(-5\right)=17\)
\(N=12-15-20=-3-20=-23\)\(\Rightarrow M>N\)
· M=12−(15−20)
⇒M=12−(−5)=17
· N=12−15−20=−3−20=−23
⇒M>N
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