问题 解答题

125×(107×80)

854-54-47

47×65+35×47

32×125

720÷2÷9

422×87+13×422.

答案

(1)125×(107×80),

=(125×80)×107,

=10000×107,

=1070000;

(2)854-54-47,

=(854-54)-47,

=800-47,

=753;

(3)47×65+35×47,

=47×(65+35),

=47×100,

=4700;

(4)32×125,

=(4×8)×125,

=4×(8×125),

=4×1000,

=4000;

(5)720÷2÷9,

=720÷9÷2,

=80÷2,

=40;

(6)422×87+13×422,

=422×(87+13),

=422×100,

=42200.

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