How to Teach the Critical Difficulties of Arithmetic; To Accompany the California State Series Advanced Arithmetic for Normal Students and Experienced Teaches (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915. Excerpt: ... 20. Why is it incorrect to say that $400 = 1257c? Correct the statement. 21. Tell two ways of finding 33JO;, 40%, or 25% of a quantity. 22. Six out of every 100 is the same as how many per cent? 23. Is there any difference between 124% and % of 64? Illus trate with work and a diagram. 24. What per cent of is 25. Tell without working the following problems in which cases the answers will be larger and in which cases smaller than the given quantity. a. Find 105% of 650. b. What is 4% less than 220? c. Find i% of 125. d. What is 2J% more than 175? e. Find 200% of $150. 26. What per cent of a quantity is always equal to a quantity 1 TEST ON PROBLEM WORK OF PERCENTAGE. (Text pages 171-190.) The following test on the problem work of the three cases of percentage may be used as a guide when planning review work or as a test for new pupils who enter the class late in the term. Problems at the end marked with stars are the additional types with which Normal students are required to be familiar. 1. Mr. Hansen paid $6,000 for a piece of property. He wishes to rent the property so that he may have a net income of 6% on his investment. His yearly expenses average $140. Find the monthly rent Mr. Hansen must receive from his property in order to have a net income of 6%. (Difficult for pupils.) 2. Find the selling price of a horse sold at a loss of 15% which amounted to $42. 3. Given the gain and the selling price, tell how to find the gain per cent and illustrate with a problem of your own. 4. At the close of the year 1913, there were 640 pupils in a certain school. How many more pupils must be enrolled during 1914 to have the enrollment at the end of the year 1914 25% greater than at the close of the year 1913? 5. When the gain and the gain per cent are ...