问题
填空题
把算式补充完整,使之能简算.
①2.5×1.36×0.4=______×(______×0.4)
②7.5×0.48+0.48×2.5=(7.5+______)×______.
答案
①2.5×1.36×0.4,
=1.36×(2.5×0.4),
=1.36×1,
=1.36;
②7.5×0.48+0.48×2.5,
=(7.5+2.5)×0.48,
=10×0.48,
=4.8.
故答案为:①1.36、2.5,②2.5、0.48.