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.focusBox,.focusBox2{ width:580px; height:90px; overflow:hidden; margin:20px auto; position:relative;}
.focusNum,.focusNum2{ position:absolute; right:5px; bottom:5px;}
.focusNum span,.focusNum2 span{ display:inline-block; width:20px; height:18px; line-height:18px; text-align:center; margin-right:5px; background-color:#666; color:#FFF; cursor:pointer;}
.focusNum span.on,.focusNum2 span.on2{ background-color:#FF6633; font-weight:bold;}
幼教网整理了关于一年级下册口算题:20以内的连加连减混合,希望对幼儿学习有所帮助,仅供参考。
(1)3+2+7=
(2)19-8-6=
(3)17-9-6=
(4)9-1-5=
(5)2+17+1=
(6)9+8+1=
(7)8-7-1=
(8)10-8-1=
(9)17-16-1=
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