688  Stamp
How many stamps? 2

Name : _________________

 

refresh

There are 170 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 780 cents. How many 4-cent stamps are there?



There are 130 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 590 cents. How many 3-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 940 cents. How many 7-cent stamps are there?



There are 180 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1190 cents. How many 8-cent stamps are there?



There are 150 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 850 cents. How many 5-cent stamps are there?



There are 200 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1360 cents. How many 5-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1190 cents. How many 7-cent stamps are there?



¿À´Ã 7¿øÂ¥¸® 5¿øÂ¥¸® ¿ìÇ¥ ÃÑ 200 ÀåÀ» »ç°í, 1200 ¿øÀ» ÁöºÒ ÇßÀ»¶§, ¸î°³ÀÇ 7¿øÂ¥¸® ¿ìÇ¥¸¦ »ò´Â°¡?



There are 210 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1570 cents. How many 5-cent stamps are there?



There are 180 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1350 cents. How many 6-cent stamps are there?



+(         )

 

(         )+

++[[          ]]++

688    120 80 100 130 100 ( 530 )   110 140 100 80 90 ( 520 )   [[ 1050 ]]