989  Stamp
How many stamps? 2

Name : _________________

 

refresh

There are 270 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1290 cents. How many 3-cent stamps are there?



There are 210 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1000 cents. How many 6-cent stamps are there?



There are 240 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 980 cents. How many 5-cent stamps are there?



There are 240 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1120 cents. How many 3-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 850 cents. How many 4-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 900 cents. How many 3-cent stamps are there?



There are 270 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1340 cents. How many 4-cent stamps are there?



¿À´Ã 8¿øÂ¥¸® 5¿øÂ¥¸® ¿ìÇ¥ ÃÑ 200 ÀåÀ» »ç°í, 1390 ¿øÀ» ÁöºÒ ÇßÀ»¶§, ¸î°³ÀÇ 8¿øÂ¥¸® ¿ìÇ¥¸¦ »ò´Â°¡?



There are 250 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1410 cents. How many 3-cent stamps are there?



There are 230 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1510 cents. How many 8-cent stamps are there?



+(         )

 

(         )+

++[[          ]]++

989    150 80 130 140 150 ( 650 )   100 140 130 140 120 ( 630 )   [[ 1280 ]]