直接写出得数．1.8÷= 0.65+= 0.64+3.6= ×2÷= 349×≈+=1 ÷1.3= ÷2.4= 0.625×= 19.9×3.14≈
直接写得数 0.4+=×=÷= 25%×4=÷7= 3.14×32= 1﹣80%=××15=×= 3000×40%=
×=÷=×= 2×=÷=÷3=+=﹣=
直接写出得数 3×= ×= ×18= ×= = ÷= ÷= 3×= ．
直接写得数．========
12+9.9= 1÷0.25=÷=×50%=﹣=（0.75﹣）×96=
= 0.65+
= 0.64+3.6= 
×2÷
≈
+
=1 
÷1.3= 
÷2.4= 0.625×
= 19.9×3.14≈
=
×
÷
= 25%×4=
÷7=
×
×15=
×
= 3000×40%=
×
=
÷
=
×
=
=
÷3=
+
=
﹣
=
= 
×
= 
×18= 
×
= 
= 
÷
= 
÷
= 3×
= ．
=
=
=
=
=
=
=
=
÷
=
×50%=
﹣
=（0.75﹣
）×96=
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