1是所有自然数的因数． ．
直接写出答案． 289+417= 1.25×80%== 0.98÷7=﹣= （+）÷8= 28××0= 701﹣2.32= 1﹣=×4=
直接写出得数． 95﹣37=÷=+=×= 25%﹣= 0.625+= 98×101= 18×=÷15= 9.25×0.125+×=
直接写出结果 45+38=÷3= 4.2÷0.07= 11×= 0.875×24= 1÷= 7.2×= 8﹣= 0.25﹣=×0÷=
口算． 3.7+0.63= 3.2×= 8﹣= 2.5×6.7×4= 75×99= 81÷=+=×（8+5）×=
直接写出得数： 8×=÷12=×= 0×= 3﹣=×=5÷=÷=÷=（+）×16= 0.8×1.5=﹣1÷3=
= 0.98÷7=
﹣
=
+
）÷8= 28×
×0= 701﹣2.32= 1﹣
=
×4=
÷
=
+
=
×
=
= 0.625+
= 98×101= 18×
=
÷15= 9.25×0.125+
×
=
÷3= 4.2÷0.07= 11×
=
= 7.2×
= 8﹣
=
=
×0÷
=
= 8﹣
= 2.5×6.7×4=
=
+
×（8+5）×
=
=
÷12=
×
= 0×
=
=
×
=5÷
=
÷
=
÷
=（
+
）×16= 0.8×1.5=
﹣1÷3=
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