口算．62+18= 50﹣24= 31÷7= （20﹣4）÷4= 4×9= 21÷3=
直接写得数．﹣= 3+1=×6= 7.43﹣1.4﹣2.6= 1÷= 5.1+0.3= 0÷（﹣）= 25×4= 5.4÷0.3=
直接写得数 2﹣=×= 20%÷=×30%= 3.5+1.5= 0.5×=
直接写出得数+= 1÷0.25= 3.14×8= 6.3×= 2.4÷=×= 80×40%= 21÷=﹣×5=×18×=
直接写得数+=×12= 1÷5%= 1﹣0.625=
口算==×= 2﹣==×=
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﹣
= 3+1
=
×6= 7.43﹣1.4﹣2.6= 1÷
=
﹣
）= 25×4= 5.4÷0.3=
=
×
= 20%÷
=
×30%= 3.5+1.5= 0.5×
+
=
= 2.4÷
=
×
= 80×40%= 21÷
=
﹣
×5=
×18×
=
+
=
×12= 1÷5%= 1﹣0.625=
=
=
×
=
=
=
×
=