①1997×19961996﹣1996×19971997
②
③3.672÷0.08÷ +3
×3.95÷0.1-33
÷2
④(1+ +
+
)×(
+
+
+
)-(1+
+
+
+
)×(
+
+
)
⑤ +(
+
)+(
+
+
)+(
+
+
+
)+......+(
+
+
+......+
)