a) \(100-\left[90+\left(50-2^3.5\right)\right]\)
\(=100-\left[90+\left(50-8.5\right)\right]\)
\(=100-\left[90+\left(50-40\right)\right]\)
\(=100-\left[90+10\right]\)
\(=100-100\)
\(=0\)
b) \(-10-\left(-72+8\right)\)
\(=-10-\left(-64\right)\)
\(=54\)
Hc tốt
a) 100 - [90 + (50 - 23 . 5)]
= 100 - [90 + (50 - 8 . 5)]
= 100 - [90 + (50 - 40)]
= 100 - (90 + 10)
= 100 - 100 = 0
b) -10 - (-72 + 8)
= -10 - (-64)
= -10 + 64
= 54
#Học tốt!!!
~NTTH~
