427  Stamp
How many stamps? 2

Name : _________________

 

refresh

There are 140 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 990 cents. How many 6-cent stamps are there?



There are 210 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1080 cents. How many 6-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1530 cents. How many 6-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 750 cents. How many 4-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1180 cents. How many 6-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1180 cents. How many 6-cent stamps are there?



There are 220 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1260 cents. How many 3-cent stamps are there?



¿À´Ã 6¿øÂ¥¸® 5¿øÂ¥¸® ¿ìÇ¥ ÃÑ 190 ÀåÀ» »ç°í, 1040 ¿øÀ» ÁöºÒ ÇßÀ»¶§, ¸î°³ÀÇ 6¿øÂ¥¸® ¿ìÇ¥¸¦ »ò´Â°¡?



There are 140 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 830 cents. How many 7-cent stamps are there?



There are 230 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 790 cents. How many 4-cent stamps are there?



+(         )

 

(         )+

++[[          ]]++

427    90 120 150 120 150 ( 630 )   130 120 90 90 100 ( 530 )   [[ 1160 ]]