Đáp án:
a,$5^3$
b, $2^8$
c, $7$
Giải thích các bước giải:
a, $25.5^3.\dfrac{1}{625}.5^2=5^2.5^3.\dfrac{1}{5^4}.5^2=5^3$
b, $4.32:(2^3.\dfrac{1}{16})=2^2.2^5:(2^3.\dfrac{1}{2^4})=2^2.2^5:\dfrac{1}{2}=2^8$
c, $5^2.3^5.(\dfrac{2}{5})^2=3^5.2^2=972^1$
d, $(\dfrac{1}{7})^2.\dfrac{1}{7}.49^2=\dfrac{1}{7^2}.\dfrac{1}{7}.7^4=7$