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题型：填空题 题类：常考题 难易度：普通
9的乘法口诀1873 10
×9＝45
×1＝9
摆5个这样的图形，一共需要用（ ）个小△．
7×1 = 6 × 2 = 3×8 = 2×6 =
5×3 = 9 × 3 = 2×7 = 5 × 4 =
8×2 = 4× 8 = 3 ×9 = 7 × 3 =
9×6{#blank#}1{#/blank#}8×7 8×3{#blank#}2{#/blank#}3×7
7×6+23{#blank#}3{#/blank#}98-13-12 8×9{#blank#}4{#/blank#}30+16+26
5×7{#blank#}5{#/blank#}2×8+20 17-8+37{#blank#}6{#/blank#}6×8
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