直接写得数．
180+470= 5÷8= 25×2.4= 12﹣
=
÷14= 
+
= 1.25×
×0.8= 
×=
÷
= 
﹣
= 
×4÷4×= 2.4×
=
（
+
）×16= 12.01×9.98≈ 2÷0.2%= 60×20%=
直接写得数．
180+470= 5÷8= 25×2.4= 12﹣=÷14= += 1.25××0.8= ×=÷= ﹣= ×4÷4×= 2.4×=
（+）×16= 12.01×9.98≈ 2÷0.2%= 60×20%=
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