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题型:多选题 题类:常考题 难易度:困难
6的乘法口诀 1785
龟甲上的学问。(找规律,填一填)
2+2{#blank#}1{#/blank#}2×2
3×3{#blank#}2{#/blank#}3+3
2×4{#blank#}3{#/blank#}4×2
2×1{#blank#}4{#/blank#}3×1
6×5{#blank#}5{#/blank#}6+5
6×2{#blank#}1{#/blank#}4×3 6×6{#blank#}2{#/blank#}80-42 2×4{#blank#}3{#/blank#}4+4
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