题目内容
【题目】用你喜欢的方法计算下面各题.
(1)22.7﹣1.8+17.3﹣18.2
(2)(
+
)×8+ ![]()
(3)[
﹣(
﹣
)]÷ ![]()
(4)3.4×2.77+0.23×3.4
(5)(
+
+
)×72
(6)
+
+
+
.
【答案】(1)解: 22.7﹣1.8+17.3﹣18.2
=(22.7+17.3)﹣(1.8+18.2)
=40﹣20
=20;
(2)解: (
+
)×8+ ![]()
=(
×8+
×8)+ ![]()
=3+
+ ![]()
=3+(
+
)
=3+1
=4;
(3)解: [
﹣(
﹣
)]÷ ![]()
=[
﹣
]÷ ![]()
=
÷ ![]()
=
;
(4)解: 3.4×2.77+0.23×3.4
=3.4×(2.77+0.23)
=3.4×3
=10.2;
(5)解: (
+
+
)×72
=
×72+
×72+
×72
=30+8+27
=65;
(6)解:
+
+
+ ![]()
=(
+
)+(
+
)
=1+1
=2
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