1.4*25+3.45怎么简便

1.4*25+3.45怎么简便
1.4*25+3.45怎么简便

1.4*25+3.45怎么简便
1.4*25+3.45
=（1+0.4）*25+3.45
=25+25*0.4+3.45
=25+10+3.45
=35+3.45
=38.45
希望对你有帮助

(7)8.4*6.9/(6.44-4.14) (8)4.8*0.27+0.52*2.7 （1）0.259(2)68.72 (3)38.45(4)37（5）18.75(6)14.5(7)25.2(8)2