简便计算3.1+25.7
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发布时间:2024-09-30 05:19
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时间:2024-11-05 09:32
(1)3.1+25.78+6.9,
=(3.1+6.9)+25.78,
=10+25.78,
=35.78;
(2)12.7-4.8-5.2,
=12.7-(4.8+5.2),
=12.7-10,
=2.7;
(3)34.82-(4.82+15.2),
=34.82-4.82-15.2,
=30-15.2,
=14.8;
(4)15.25+4.72+4.75+5.28,
=(15.25+4.75)+(4.72+5.28),
=20+10,
=30.