a) (3.5 cdot 3m = 3.5 cdot 3 cdot m = 10.5m)
б) (-6ax^3 cdot 9bx^2 = -6 cdot 9 cdot a cdot b cdot x^3 cdot x^2 = -54abx^{3+2} = -54abx^5)
в) (-8a^2b^2 cdot (-8a^3b^5) = -8 cdot (-8) cdot a^2 cdot a^3 cdot b^2 cdot b^5 = 64a^{2+3}b^{2+5} = 64a^5b^7)
г) (ab cdot (-7ab^2) cdot 4a^2b = -7 cdot 4 cdot a cdot a cdot a^2 cdot b cdot b^2 cdot b = -28a^{1+1+2}b^{1+2+1} = -28a^4b^4)
д) (10x^2y cdot (-xy^2) cdot 0.6x^3 = 10 cdot (-1) cdot 0.6 cdot x^2 cdot x cdot x^3 cdot y cdot y^2 = -6x^{2+1+3}y^{1+2} = -6x^6y^3)
е) (-9ab^2 cdot 3a^3 cdot (-4b) = -9 cdot 3 cdot (-4) cdot a cdot a^3 cdot b^2 cdot b = 108a^{1+3}b^{2+1} = 108a^4b^3)