1. (-15)+40-65 2. 2^3.6-[2^2.3+5(32:16)^2]
câu 2.
a.125-(x-5):3=45 b.2^2.5-|x|:3^2=2^3+(-18)
câu 3 tìm x
(25+18+x) chia hết 3 và10≤x≥15
câu 4 a.5^2-4^2+3^2-2^2+1^0
b,H=55:{121:[100-(22+67)]}
c,5^2x=5^20:5^10
1. (-15)+40-65 2. 2^3.6-[2^2.3+5(32:16)^2] câu 2. a.125-(x-5):3=45 b.2^2.5-|x|:3^2=2^3
By Adeline
(-15) + 40 – 65 = 25 – 65 = -40