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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