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题型:解决问题 题类:常考题 难易度:困难
平面图形的拼组970(10题)
{#blank#}1{#/blank#} + {#blank#}2{#/blank#} = {#blank#}3{#/blank#}
想: {#blank#}4{#/blank#}个十加{#blank#}5{#/blank#}个十是{#blank#}6{#/blank#}个十.
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