6X^2×3XY
=(6×3)X^(2+1)Y
=18X^3Y
2AB^2×(-3AB)
=2×(-3)A^(1+1)B^(2+1)
=-6A^2B^3
4X^2Y×(-XY^2)^3
=4X^2Y×(-X^3Y^6)
=4×(-1)X^(2+3)Y^(1+6)
=-4X^5Y^7
(1.3×10^5)(3.8×10^3)
=1.3×3.8×10^(5+3)
=4.94×10^8
6X^2×3XY
=(6×3)X^(2+1)Y
=18X^3Y
2AB^2×(-3AB)
=2×(-3)A^(1+1)B^(2+1)
=-6A^2B^3
4X^2Y×(-XY^2)^3
=4X^2Y×(-X^3Y^6)
=4×(-1)X^(2+3)Y^(1+6)
=-4X^5Y^7
(1.3×10^5)(3.8×10^3)
=1.3×3.8×10^(5+3)
=4.94×10^8