= 2﹣
= 
+
= 6×
= 0.25×4= 57×
=
÷
= 1÷
= 21÷
= 
÷
= 1÷
= 0÷
=相关试题
+
×57
+
×
2﹣1
+
﹣
﹣
+
﹣
×9+
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
是多少？最大的两位数的准确计算：
42×
×11
×15
×
×
×
3
×28
+
×
×（
+
） 15×
﹣
（﹣
）×12
×36+
18﹣16×
×（
﹣
）
×
﹣
12×（
+
）
×
﹣
（
﹣
）×24
×4+
×9﹣
×
﹣
×
×
﹣×
91×
×13﹣
69×（
×
）
×81 16.87﹣
+3.23﹣
．
准确计算：
42××11×15××× 3×28+××（+） 15×﹣（﹣）×12×36+
18﹣16××（﹣）×﹣ 12×（+）×﹣（﹣）×24×4+×9﹣×﹣××﹣× 91××13﹣
69×（×）×81 16.87﹣+3.23﹣．
×2=
×1=
×
= 12×
）3=
×7=
×
= 5﹣
=
×
=
+
×
=
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