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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以内的减法,希望对幼儿学习有所帮助,仅供参考。
(1)12-5=
(2)14-9=
(3)19-4=
(4)15-11=
(5)11-11=
(6)14-10=
(7)4-1=
(8)7-6=
(9)15-6=
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