问题
填空题
0.25×43+0.75×19=______.
答案
0.25×43+0.75×19,
=0.25×43+0.25×57,
=0.25×(43+57),
=0.25×100,
=25.
故答案为:25.
0.25×43+0.75×19=______.
0.25×43+0.75×19,
=0.25×43+0.25×57,
=0.25×(43+57),
=0.25×100,
=25.
故答案为:25.