题目内容
数学医院.
85l-136-36
=85l-(136-36)
=85l-199
=75l
改正:
789-35+65
=789-(35+65)
=789-199
=189.
85l-136-36
=85l-(136-36)
=85l-199
=75l
改正:
789-35+65
=789-(35+65)
=789-199
=189.
(1)改正:
854-136-36,
=854-(136+36),
=854-1k2,
=682;
(2)改正:
289-35+65,
=254+65,
=319.
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