题目内容

35×25×425×166×48×(25×15)
20×72×515×11×271×8×5
39×20×515×3×4125×7×4.

(1)35×25×4,
=35×(25×4),
=35×100,
=3500;

(2)25×166×4,
=25×4×166,
=100×166,
=16600;

(3)8×(25×15),
=(8×25)×15,
=200×15,
=3000;

(4)20×72×5,
=20×5×72,
=100×72,
=7200;

(5)15×11×2,
=15×2×11,
=30×11,
=330;

(6)71×8×5,
=71×(8×5),
=71×40,
=2840;

(7)39×20×5,
=39×(20×5),
=39×100,
=3900;

(8)15×3×4,
=15×4×3,
=60×3,
=180;

(9)125×7×4,
=125×4×7,
=500×7,
=3500.
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