解:0.78大
∵已知需求出0.78和0.375哪个大
∴0.78
= 78 / 100
= 39/50
= (39×8)/(50×8)
= 312/400
0.375
= 375 / 1000
= 3/8
= (3×50)/(8×50)
= 150/400
∴312/400 > 150/400
即0.78 > 0.375
答:0.78大
毋庸置疑,肯定是0.78大,因为比较小数点后一位,7比3大
0.78