竖式计算，并验算 45.6+37.7= 28.3﹣17.6=
直接写出得数 3×= ×= ×18= ×= = ÷= ÷= 3×= ．
直接写得数．========
12+9.9= 1÷0.25=÷=×50%=﹣=（0.75﹣）×96=
直接写得数．+= 6÷=÷4= 2×=÷5= 24÷=×=÷=×24=×=÷=×=
﹣=÷12= 15×= 36÷=+=×12=÷=×=
= 
×
= 
×18= 
×
= 
= 
÷
= 
÷
= 3×
= ．
=
=
=
=
=
=
=
=
÷
=
×50%=
﹣
=（0.75﹣
）×96=
+
= 6÷
=
÷4= 2×
÷5= 24÷
=
×
=
÷
×
=
÷
=
×
=
﹣
=
÷12= 15×
=
=
+
=
÷
=
×
=
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