问题
填空题
浓度为20%的80克糖水中,加______克水就得到浓度为8%的糖水.
答案
(80×20%)÷8%-80,
=16÷8%-80,
=200-80,
=120(克);
答:加120克水,才能得到浓度为8%的糖水.
故答案为:120.
浓度为20%的80克糖水中,加______克水就得到浓度为8%的糖水.
(80×20%)÷8%-80,
=16÷8%-80,
=200-80,
=120(克);
答:加120克水,才能得到浓度为8%的糖水.
故答案为:120.