Explicație pas cu pas:
a) 3^5×3^2=3^(5+2)=3^7
b) 2^3×2^5=2^(3+5)=2^8
c) 5^5×5^4×5^1=5^(5+4+1)=5^10
d) 5^6÷5^4=5^(6-4)=5^2=25
e) 7^3:7^1=7^(3-1)=7^2=49
f) 2^8×2^6÷2^12=2^(8+6-12)=2^2=4
g) 5^6÷5^5=5^1
h) 2^74÷(2^3×2^70)+103×(2+2×102)= 2^74÷2^73+103×206= =2+21.218=21.220
i) 2^9÷2^8+6^2÷(2×9)=2+36÷18=2+2=4
j) {2×5^2- [7^2- (18^2÷12-9^4÷3^6) ÷2] ÷2^2} ÷ 2^3=
={2×5^2-[7^2-(27-3^(8-6))÷2]÷2^2}÷2^3=
={2×5^2-[7^2-18÷2]÷2^2}÷2^3=
={2×5^2-40÷4}÷2^3=
=(50-10)÷8=
=40÷8=5
