（1）两个因数的积是一个三位小数，它保留两位小数的近似值是9.90．这两个因数的积的准确值最大可能是 ，最小可能是 ．（2）两个因数的积保留整数的近似数是l4，精确值可能是哪些数？
直接写得数．×=÷2=×= 68÷10%=×72%×÷=﹣+= 1﹣﹣= 80%﹣20%= 4×25%+16×25%=×÷×=（+）×12=
===== 0×1.27====== 1.5÷25%+1.5=
口算：× 45×÷10 0÷ 54×÷×64 12÷（﹣）×24 3×÷3×．
直接写出得数×= 1﹣=÷1=÷=×= 2.5×=×= 52×=×÷×= 0÷5×=
直接写得数．= 24÷====﹣==﹣×=
×
=
÷2=
= 68÷10%=
×72%
×
÷
=
﹣
+
= 1﹣
﹣
=
×
÷
×
=（
+
）×12=
=
=
=
=
= 0×1.27=
=
=
=
=
= 1.5÷25%+1.5=
×
45×
÷10 0÷
54×
÷
×64 12÷
（
﹣
）×24 3×
÷3×
×
= 1﹣
=
÷1=
÷
=
×
= 2.5×
=
×
= 52×
=
×
÷
×
= 0÷5×
=
= 24÷
=
=
=
=
﹣
=
=
=
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