Question

[nguyễn trần thái hà]

a)58.75+58.50-58.25

b) 20:2^2-5^9:5^8

c.(5^19:5^17-4):7

d)_84:4+3^9:3^7+5^0

e)295-(31-2^2.5)^2

f) 11^25 :11^23 -3^5:(1^10)+2^3-60)

Answer 1

[Nguyễn Quốc Khánh]

a) 58.75+58.50-58.25

=58.(75+50-25)

=58.100

=5800

b) \(20:2^2-5^9:5^8\)

\(20:4-5\)

\(5-5=0\)

c)\(\left(5^{19}:5^{17}-4\right):7\)

\(\left(5^2-4\right):7\)

\(\left(25-4\right):7\)

\(21:7\)

=\(3\)

d) \(84:4+3^9:3^7+5^0\)

\(=21+3^2+1\)

\(=21+9+1\)

\(30+1=31\)

e) \(295-\left(31-2^2.5\right)^2\)

\(295-\left(31-4.5\right)^2\)

\(295-\left(31-20\right)^2\)

\(295-\left(11\right)^2\)

\(295-121\)

\(=174\)

f) \(11^{25}:11^{23}-3^5:\left(1^{10}\right)+2^3-60\)

\(11^2-243:1+8-60\)

\(121-243+8-60\)

\(-122+8-60\)

\(-114-60\)

\(=-174\)