36×45= 2.6+12.75= 78×22= 87×21=
==== 3.14×5======
直接写出得数． 1﹣40%= ll7%﹣1.02=+40%=﹣24%= 60×15%= 60÷80%=×=÷=
直接写得数． 0.16+0.64= 3﹣0.7= 0.15×4= 1.2÷0.3= 1÷0.1=+=﹣=×=÷= 12÷16=
直接写得数． 1﹣= 1÷=﹣=×= 0÷=
直接写得数×14= 1﹣=+=﹣= 1÷=×=÷= 0.25﹣= 0.125÷=÷=
=
=
=
=
=
=
=
=
=
+40%=
﹣24%=
×
=
÷
=
+
=
×
=
= 1÷
﹣
=
×
×14= 1﹣
=
+
=
=
=
×
=
÷
= 0.25﹣
=
=
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