西师版教材小学数学三年级下册,洛表一小 李 静,探索规律,88= 1 (筐),我发现:,在除法里,除数不变,被除数扩大几倍,商就扩大几倍;,168= 2 (筐),248= 3 (筐),328= 4 (筐),408= 5 (筐),1,2,3,4,5,被除数缩小几倍商就缩小几倍.,根据105=2直接写出下面算式的结果,405=,605=,805=,505=,705=,905=,8,12,16,10,14,18,402=,404=,408=,试一试,20,10,5,在除法里，被除数不变， 除数扩大几倍，商反而缩小几倍；,除数缩小几倍，商反而扩大几倍,4=,480,=,90,180,45,60,120,240,课外拓展,30 3 = 10 60 6 = 10 90 9 = 10 1,
