口算
56+37= 80﹣16= 31.5+5= 12﹣1.1=
2×0.2= 2.87÷0.7= 30÷50= 25×8=
= 12×
= 
×
= 
=
1÷
= 0×
= 
+
= 
=
口算
56+37= 80﹣16= 31.5+5= 12﹣1.1=
2×0.2= 2.87÷0.7= 30÷50= 25×8== 12×= ×= =
1÷= 0×= += =
② 
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