Customary and metric conversions Using stoichiometry 8/21/2017

Customary units of length 1ft 12 in (1x12)=12 in 1 ft 3ft 12in (3x12/1)=36in 1ft 1 ft= 12 in 1yd= 3 ft 1 mile = 5,280 ft OR 1,760 yd The unit/measurement we are converting Multiply across Divide the bottom number The ratio (there are 12 in in 1 ft)

Lets practice stoichiometry… 72 inches to feet 33 feet to yards 25 feet to inches 72 in 1ft 6 feet 12in 33 ft 1yd 11 yds 3 ft 25 ft 12 in 300 inches 1 ft 72-12=60 60-12=48 48-12=36 36-12=24 24-12=12 12-12=0 33/11=3 **if it does not come out to a whole number, use repeated subtraction to get a mixed #. 25x12=300 inches

Customary units of Mass 1lb 16 oz (1x16)=16oz 1 lb 48oz 1 lb 3 lbs 16 oz 1 lb= 16 oz 1 ton= 2,000 lbs 48-16= 32 32-16=16 16-16=0 Division is repeated subtraction. The unit/measurement we are converting The ratio (there are 16 oz in 1 lb)

Lets practice stoichiometry… 24oz to lb 3 lb to oz 3000 lb to tons 24 oz 1 lb 1 ½ lb 16 oz 3lb 16oz 48 oz 1 lb 3000lb 1 ton 1 ½ tons 2000 lb 24-16=8 1 lb with 8 oz left over 33/11=3 **if it does not come out to a whole number, use repeated subtraction to get a mixed #. 3000-2000=1000 1000= ½ ton

Customary units of Volume 10c 8floz (10x8)=80 floz 1 c 9 qt 1 g 2 ¼ g 4 qt 1cup= 8 fluid oz 1pint= 2c=16 floz 1qt=2 pint=4 cups =36floz 1g= 4 qt=8 pt=16 c= 128 floz 9-4=5 5-4=1 One quart left over Division is repeated subtraction. The unit/measurement we are converting The ratio (there are 4 qts in 1 gallon)

Lets practice stoichiometry… 17 cups to pints 2 g to quarts 35 floz to cups 17 c 1 p 8 ½ p 2 c 2 g 4qt 8qt 1 g 35floz 1 c 4 3/8 c 8floz 17/2= NOT A WHOLE NUMBER… 17-1=16 16/2=8 +1 CUP