141 very useful cards. Each featured number comes in 3 different cards:
1) number and English word
2) number and Spanish word
3) number and words in both languages
Includes the following numbers:
1-100 in intervals of one
100-900 in intervals of 100
1,000-9,000 in intervals of 1,000
10,000-90,000 in intervals of 10,000
100,000-900,000 in intervals of 100,000
1,000,000-9,000,000 in intervals of 1,000,000
10,000-100,000,000 in intervals of 10,000,000
Plus: one billion, 10 billions and 100 billion