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题型：解决问题 题类：常考题 难易度：普通
一年级 加、减两步式题299
3＋4＋1{#blank#}1{#/blank#}7
8 - {#blank#}1{#/blank#} - {#blank#}2{#/blank#} = {#blank#}3{#/blank#}
{#blank#}1{#/blank#} + {#blank#}2{#/blank#} + {#blank#}3{#/blank#} = {#blank#}4{#/blank#}
9-2-3= 8+0-4= 5+3-5=
6+2-3= 9-4+1= 8-8+2=
7-3-2= 9-0-3= 8-5-3=
3+6-4= 4+5-6= 2+6+1=
8-0-3= 9-7+2= 8-3+3=
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