4.1×25巧算

Question

4.1×25巧算

Answer 1

4.1×25
=（4+0.1）×25
=4×25+0.1×25
=100+2.5
=102.5

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Answer 2

=（4+0.1）x25
=100+0.25
=100.25追答

=（4+0.1）x25
=100+2.5
=102.5

Answer 3

（4+0.1）*25=4*25+0.1*25=100.25