Question

Thực hiện phép tính (Tính hợp lí nếu có thể)

a) 2023+64+(-2023)+36

b) (45-17)-(40-157+45)

c) 2023⁰-3.[5².10-(23-13)²]

Answer 1

a: \(2023+64+\left(-2023\right)+36\)

\(=\left(2023-2023\right)+\left(64+36\right)\)

=0+100

=100

b: \(\left(45-17\right)-\left(40-157+45\right)\)

\(=45-17-40+157-45\)

\(=\left(45-45\right)+\left(157-17-40\right)\)

=0+100

=100

c: \(2023^0-3\cdot\left[5^2\cdot10-\left(23-13\right)^2\right]\)

\(=1-3\cdot\left[25\cdot10-10^2\right]\)

\(=1-3\cdot\left(250-100\right)\)

\(=1-3\cdot150=1-450=-449\)