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A Treatise on Mental Arithmetic, in Theory and Practice
Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015
A Treatise on Mental Arithmetic: In Theory and Practice (1848)
Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2009
acre adding addition aliquot amount annum answer appear barrel Bought British called cent cloth consider contains cost cuts difference divide divisible dozen dwts easily ells English equal exact EXAMPLE EXAMPLE II Exercises farthings feet figure find the interest find the price flour foot gain gallons give given given price grains gross guineas half hand Hence higher denomination hundred inches increase Irish leap long weight loss MEASURE mentally method miles minutes months multiply nails nearly obtained ounce pence penny perch pound avoirdupois pounds price of 20 principal quantity quarter questions quires reams reason receive remainder result roods rule salary score seconds sell sheets shillings short weight Simple sold square stones subtract TABLE taken third tons troy twice wages week yards
Σελίδα 16 - OF TIME. 60 Seconds = 1 Minute 60 Minutes = 1 Hour 24 Hours = 1 Day 7 Days = 1 Week 28 Days = 1 Lunar Month...
Σελίδα 19 - MEASURE. 10 millimetres = 1 centimetre. 10 centimetres = 1 decimetre. 10 decimetres = 1 metre. 10 metres = 1 decametre. 10 decametres = 1 hectometre. 10 hectometres = 1 kilometre.
Σελίδα 85 - Then multiply the second and third terms together, and divide the product by the first term: the quotient will be the fourth term, or answer.
Σελίδα 19 - English cubic inches. 10 millilitres . . = 1 centilitre; 10 centilitres . . = 1 decilitre; 10 decilitres . . =1 LITRE; 10 Litres . . =1 decalitre; 10 decalitres . . = 1 hectolitre; 10 hectolitres . =1 chilolitre; 10 chilolitres . . =1 myrialitre.
Σελίδα 17 - Thirty days hath September, April, June, and November; February hath twenty-eight alone, And all the rest have thirty-one, Except in leap year, at which time February's days are twenty-nine.
Σελίδα 8 - MONEY. 4 farthings = 1 penny. 12 pence = 1 shilling. 20 shillings = 1 pound.
Σελίδα 87 - If 9 men can do a piece of work in 8 days, how long will it take one man to do the same work ? 4.
Σελίδα 16 - The months of the year are: January, February, March, April, May, June, July, August, September, October, November, December.
Σελίδα 88 - How many days' work can 9 men do in 24 days ? 31. How many days will it take 1 man to perform a piece of work, that 9 men will perform in 24 days ? 32 How many days will it take 1 man to build a piece of road, that 13 men can build in 47 days ? 33. How many men must be employed to do a piece of work in 1 day, that 11 men can perform in 18 days ? 34.