问题 解答题

在○里填运算符号,在□中填数.

(1)465-199

=465-200○□

=□○□

=□

(2)99×33

=(100○□)×33

=100×33○□×33

=□

(3)125×56

=125×(□×□)

=125×□×□

=□

(4)3000÷4÷25

=3000÷(□○□)

=3000÷□

=□

答案

(1)465-199

=465-200+1

=265+1,

=266;

(2)99×33

=(100-1)×33,

=100×33-1×33,

=3277;

(3)125×56

=125×(8×7)

=125×8×7,

=7000;

(4)3000÷4÷25

=3000÷(4×25),

=3000÷100,

=30.

故答案为:+,1,265+1,266;-,1,-1,3277;8×7,8,7,7000;4×25,100,30.

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