抽屉里有三种颜色的筷子各十根，至少取出多少根，才能保证有三双相同颜色的筷子？
直接写出得数． 0.56÷8= 6.4+= 1.2×= 219+398= 0.6×0=÷0.8= 4= 3=××5×7= 2010×0.25×4=
直接写出得数 647﹣298= 5.6÷0.7= 8109÷9= 1﹣35%= 2×÷2×=+=÷25%= 3.05+6.2= 9.8﹣0.98= 2﹣﹣=
直接写出得数：+=﹣=×0=×=÷=÷1= 1﹣=÷7=
直接写出得数： 1﹣=+=×5.6=÷=÷= 3.46+5.4= 910÷7= 4.2×100= 348﹣199= 25×4=
直接写出得数． ①1÷0.5 ②÷ ③（+）×24 ④0.1÷0.1÷0.6 ⑤×9+×9 ⑥4÷9×．
= 1.2×
= 219+398= 0.6×0=
÷0.8= 4
= 3
=
×
×5×7= 2010×0.25×4=
÷2×
+
=
÷25%= 3.05+6.2=
﹣
=
+
=
﹣
=
×0=
×
=
÷
=
÷1= 1﹣
=
÷7=
=
+
=
×5.6=
÷
=
÷
÷
+
）×24
×9+
×9
．
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