Question

Talk about the solutions to air pollution. Tầm cỡ 4-5 dòng giấy A4 là được ạ. Giúp em với, em cảm ơn ạ.

Answer 1

Converting cubic kilometers to cubic centimeters:

1 km3=(1×105 cm)3=1×1015 cm31 km3=(1×105 cm)3=1×1015 cm3

100 km3=100×1015=1×1017 cm3100 km3=100×1015=1×1017 cm3

Calculations:

0+17=0+1=10+17=0+1=1231+92=23+81=104231+92=23+81=1049818×983=9818+3=98219818×983=9818+3=9821

Percentages and division:

100/102=50/51100/102=50/511/2021/202 remains as is.100%+192%−87%+1002=100%+192%−87%+1002%=1007%100%+192%−87%+1002=100%+192%−87%+1002%=1007%9182%+19%+10293%=9182%+19%+10293%=19594%9182%+19%+10293%=9182%+19%+10293%=19594%

More arithmetic:

(9−10)+10−2=−1+10−2=7(9−10)+10−2=−1+10−2=778/2−(10293−93193)=39−82900=−8286178/2−(10293−93193)=39−82900=−82861

So, summarizing:

100 km3=1×1017 cm3100 km3=1×1017 cm30+17=10+17=1231+92=104231+92=1049818×983=98219818×983=9821100/102:1/202=50/51:1/202100/102:1/202=50/51:1/202100%+192%−87%+1002=1007%100%+192%−87%+1002=1007%9182%+19%+10293=19594%9182%+19%+10293=19594%(9−10)+10−2=7(9−10)+10−2=778:2−(10293−93193)=−8286178:2−(10293−93193)=−82861Viết linh tinh +=)