2.8×7.25.1÷2.8÷3.6÷5.1怎么写
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2.8×7.25.1÷2.8÷3.6÷5.1怎么写
![2.8×7.25.1÷2.8÷3.6÷5.1怎么写](/uploads/image/z/19145377-1-7.jpg?t=2.8%C3%977.25.1%C3%B72.8%C3%B73.6%C3%B75.1%E6%80%8E%E4%B9%88%E5%86%99)
应该是2.8×7.2×5.1÷2.8÷3.6÷5.1吧?
2.8×7.2×5.1÷2.8÷3.6÷5.1
=2.8÷2.8×5.1÷5.1×7.2÷3.6
=1×1×7.2÷3.6
=7.2÷3.6
=2
2.8×7.2×5.1÷2.8÷3.6÷5.1
=2.8÷2.8×5.1÷5.1×7.2÷3.6
=1×1×7.2÷3.6
=7.2÷3.6
=2