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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