题目内容
下面各题计算的对吗?把不对的改正过来.
(1)28÷2.6+18
=28+18
=46
(2)12.8÷(6.4÷0.8)
=2÷0.8
=2.5
(3)7.2-3.4×0.6
=3.8×0.6
=2.28.
(1)28÷2.6+18
=28+18
=46
(2)12.8÷(6.4÷0.8)
=2÷0.8
=2.5
(3)7.2-3.4×0.6
=3.8×0.6
=2.28.
(1)×;
改正:
28÷2.6+18
≈10.77+18
=28.77;
(2)×;
改正:
12.8÷(6.4÷0.8)
=12.8÷8
=1.6;
(3)×;
改正:
7.2-3.4×0.6
=7.2-2.04
=5.16.
改正:
28÷2.6+18
≈10.77+18
=28.77;
(2)×;
改正:
12.8÷(6.4÷0.8)
=12.8÷8
=1.6;
(3)×;
改正:
7.2-3.4×0.6
=7.2-2.04
=5.16.
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