脱式计算: 800-600÷20 ...

脱式计算: 800-600÷20 18×(537-488) 25×37×4 720÷16÷5.

(1)800-600÷20,
=800-30,
=770;

(2)18×(537-488),
=18×49,
=882;

(3)25×37×4,
=25×4×37
=100×37,
=3700;

(4)720÷16÷5,
=720÷(16×5),
=720÷80,
=9.
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