# Junior High School Mathematics, Book 1

H. Holt, 1919 - Mathematics - 210 pages
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### Contents

 Some Useful Terms 17 Problems without Numbers 18 The Cost Formula 20 Making Formulas 22 Formulas for Practice 26 Reduction of Fractions 28 Exercises for Practice 29 Some New Symbols 32 CHAPTER III 36 Problems Involving Large Numbers 39 Reduction of Decimal Fractions to Common Fractions 40 Multiplication and Division by Powers of 10 41 Multiplication of Decimal Fractions 43 Division of Decimal Fractions by Integers 23 Reduction of Common Fractions to Decimal Fractions 44 Division by Decimals 45 Getting Results to a Desired Degree of Accuracy 47 Advantages of the Metric System 27 Linear Measure 51 Square Measure 29 Cubic Measure 55 Capacity and Weight 56 Equivalents 57 43 44 44 59 5555 61 CHAPTER IV 63 Summary 64 Changing Per Cents to Decimals 65 Important Equivalents 66 To Find Any Per Cent of a Number 68 A Per Cent More or Less than a Number 71
 Bills 91 Kinds of Polygons 95 Problems of the Dairyman 96 Meaning of Interest 100 Finding the Time between Two Dates 106 63 110 CHAPTER VII 113 Drawing to Scale 120 64 122 65 124 The Relation between the Circumference and the Diameter 127 66 128 68 133 Kinds of Angles 134 71 140 Circular and Angular Measure 141 77 142 Standard Time 147 The Use of Ruler and Compasses 153 The Perpendicular Bisector of a Line 159 85 162 87 165 89 167 91 168 CHAPTER XI 180 The Area of a Triangle 186 Tables 205

### Popular passages

Page 195 - Dry Measure 2 pints (pt.) = 1 quart (qt.) 8 quarts = 1 peck (pk.) 4 pecks = 1 bushel (bu.) A bushel contains 2150.42 cubic inches.
Page 195 - SQUARE MEASURE 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq. yd.) 30| square yards = 1 square rod (sq. rd.) . 160 square rods = 1 acre (A.) CUBIC MEASURE 1728 cubic inches (cu.
Page 46 - MEASURES OF WEIGHT 10 milligrams (mg.) = 1 centigram (eg.) 10 centigrams = 1 decigram (dg.) 10 decigrams = 1 gram (g.) 10 grams = 1 dekagram (Dg.) 10 dekagrams = 1 hectogram (Hg.) 10 hectograms = 1 kilogram...
Page 31 - To multiply a decimal by 10, 100, 1000, &c., remove the decimal point as many places to the right as there are ciphers in the multiplier ; and if there be not places enough in the number, annex ciphers.
Page 42 - Measure 10 millimeters (mm.) — 1 centimeter (cm.) 10 centimeters = 1 decimeter (dm.) 10 decimeters -1 meter (m.) 10 meters **1 decameter (Dm.) 10 decameters —1 hectometer (Hm.) 10 hectometers - 1 kilometer (Km.) 10 kilometers •• 1 myriameter (Mm.) Square Measure 100 square millimeters (sq.
Page 31 - When a decimal number is to be divided by 10, 100, 1000, &c., remove the decimal point as many places to the left as there are ciphers in the divisor, and if there be not figures enough in the number, prefix ciphers.
Page 71 - Specific heat is the amount of heat necessary to raise the temperature of a solid or liquid body a certain number of degrees; water is adopted as the unit or standard of comparison.
Page 195 - LIQUID MEASURE 4 gills (gi.) = 1 pint (pt.) 2 pints = 1 quart (qt.) 4 quarts = 1 gallon (gal.) 31| gallons = 1 barrel (bbl.) 2 barrels = 1 hogshead (hhd...
Page 124 - Fig. 40, so that the two angles thus formed are equal, the lines are said to be perpendicular to each other and the angles formed are called right angles. An acute angle is less than a right angle, Fig.
Page 98 - A Promissory Note is a written promise to pay a certain sum of money at a specified time.