问题
解答题
算一算.
204×2×5=
312×4×2=
72×3×5=
130×2×5=
答案
204×2×5,
=204×(2×5),
=2040;
312×4×2,
=1248×2,
=2496;
72×3×5,
=216×5,
=1080;
130×2×5,
=130×(2×5),
=1300.
算一算.
204×2×5=
312×4×2=
72×3×5=
130×2×5=
204×2×5,
=204×(2×5),
=2040;
312×4×2,
=1248×2,
=2496;
72×3×5,
=216×5,
=1080;
130×2×5,
=130×(2×5),
=1300.