翻譯+解答+解釋f.1數學”

如題0v0"中文解釋=]拍謝<3"

Ken wants to send Christmas cards to friends.He needs stamps of values $0.1,$0.2,$1.4 and $2 ,and he buys 40 pieces of each from the post office. It is known that Ken sends 10 Christmas cards to China , 6 cards to The United States, 8 cards to Singapore and 9 cards to Hong Kong.

The following are the local and overseas postage rates:

Hong Kong :$1.4
China:$1.8
The United States:$2.9
Singapore:$2.3

Put as few stamps as possible on the envelopes that are sent to the following places.Fill in the number of stamps required.

Places \ Stamps $0.1 $0.2 $1.4 $2

Hong Kong 1

China 2 1

The United States 1 2

Singapore 1 1 1


The number of $1.4 stamps that Ken used up is ????? % of all the $1.4 stamps.

The number of $0.1 stamps that Ken used up is ????? % of all the $0.1 stamps.

The number of $0.2 stamps remained is ????? % of all the $0.2 stamps.

The number of stamps remained is ????? % of the original number of stamps.