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题型:填空题 题类:常考题 难易度:容易
万以内加、减法口算 2829 10
46+39=
90-44=
70+640=
600-40=
{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} = {#blank#}4{#/blank#}
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