问题 解答题

35×25×425×166×48×(25×15)

20×72×515×11×271×8×5

39×20×515×3×4125×7×4.

答案

(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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