两个不等的自然数a和b,较大的数除以较小的数,余数记为a☉b,比如5☉2=1,7☉25=4,6☉8="2." （8级）
(1)求1991☉2000,(5☉19)☉19,(19☉5)☉5;
(2)已知11☉x=2,而x小于20,求x;
(3)已知(19☉x)☉19=5,而x小于50,求x.
相关试题
两个不等的自然数a和b,较大的数除以较小的数,余数记为a☉b,比如5☉2=1,7☉25=4,6☉8="2." （8级）
(1)求1991☉2000,(5☉19)☉19,(19☉5)☉5;
(2)已知11☉x=2,而x小于20,求x;
(3)已知(19☉x)☉19=5,而x小于50,求x.
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