用7、8、9、10根同样长的小棒，顺次首尾相接摆三角形，能分别摆出几个，还剩几根？ 7÷3={#blank#}1{#/blank#}(个){#blank#}2{#/blank#} (根)
9÷3={#blank#}3{#/blank#}(个){#blank#}4{#/blank#} (根)
8÷3={#blank#}5{#/blank#}(个){#blank#}6{#/blank#} (根)
10÷3={#blank#}7{#/blank#}(个){#blank#}8{#/blank#} (根)
