Question

tính bằng cách hợp lí:

a) 325(37+45)-63(-325)+45(-225)

b) \(\dfrac{45^4.40^4.18^2}{180^6}\)

Answer 1

b)\(\dfrac{45^2.40^2.18^2}{180^2}=\dfrac{45^2.4.10.4.10.18.18}{180^2}=\dfrac{45^2.4.4.180.180}{180^{20}}=\dfrac{45^2.16}{ }\)