a,\(75-\left(3.5^2-4.2^3\right)\)
\(=75-\left(3.25-4.8\right)=75-\left(75-32\right)\)
\(=75-75+32=32\)
b, \(4.5^2-3.2^3+3^3:3^2\)
\(=4.25-3.8+3=100-24+3=79\)
c, \(58.76+24.58-5.20\)
\(=58.\left(76+24\right)-100=58.100-100\)
\(=100.\left(58-1\right)=100.57=5700\)
d, \(\left[5^2.6-20\left(27-2^5\right)\right]:10-10^0\)
\(=\left[25.6-20.\left(27-32\right)\right]:10-1\)
\(=\left(26.6+20.5\right):10-1\)
\(=\left(156+100\right):10-1=256:10-1\)
\(=15,6-1=14,6\)
Chúc bạn học tốt!!!
1) 75 - (3 . 52 - 4 . 23)
= 75 - (3 . 25 - 4 . 8)
= 75 - (75 - 32)
= 75 - 75 + 32
= 32
2) 4 . 52 - 3 . 23 + 33 : 32
= 4 . 25 - 3 . 8 + 3
= 100 - 24 + 3
= 79
3) 58 . 76 + 24 . 58 - 5 . 20
= 58 . (76 + 24) - 100
= 58 . 100 - 100
= 5800 - 100
= 5700
\(75-(3.5^2-4.2^3)\)
\(=75-(3.25-4.8)\)
\(=75-75+32=32\)
\(4.5^2-3.2^3+3^3:3^2\)
\(=4.25-3.8+3\)
\(=100-24+3=79\)
\(58.76+24.58-5.20\)
\(=58(24+76)-100\)
\(=(58-1)100=5700\)
\([5^2.6-20(27-2^5)]:10-10^0\)
\(=[5^2.6-20.-5]:10+1\)
\(=250:10+1=26\)
