计算，能用简便方法计算用简便方法．17.5÷12.5×1.4 1.58×99+1.58 19.44÷2.7÷4.8．
直接写得数﹣=×=+= 1.03+0.07= 1÷0.4=×25%= 0.05×100= 0.6：0.36=
直接写出得数： 2.2+3.5= 0.4×30= 8÷1.6= 8.2十1.8= 4.43+5.57= 8.4÷0.6= 3.5﹣1.5= 1.25×5×8===
直接写得数 62﹣35= 3+0.97= 5﹣0.6=+= （﹣）×0= 2÷2%= 24×=×3÷3×= 1÷0.125= 706﹣48﹣52=
姝姝说：两个分数相乘，积一定小于其中一个因数． ．
直接写出得数．×6= 0×=×10=×=×4=×=+= 0.25×=×= a×=﹣=+=××3=××=
﹣
=
×
=
= 1.03+0.07=
×25%= 0.05×100= 0.6：0.36=
=
===
+
=
﹣
）×0= 2÷2%= 24×
×3÷3×
×6= 0×
=
×10=
×
=
×4=
+
= 0.25×
=
×
= a×
﹣
=
+
×
×3=
×
×
=
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