How many halves in 1? Write this: 1 = }. Read and complete: = (e) 2 half-yards are how many yards? Read: = 1. Σ Look at a ruler. Count by half-inches up to 6 inches. Start:inch, or 1 inch, or 11⁄2 inches, or 2 inches, etc. (f) Add line B and line C (page 193). Write this: + } = } = 1. Also: (h) On the board, draw a line 2 feet long. Divide each foot into halves. How many halves are there? If you take away foot, how many feet are left? Write this: − = = 1}. (a) Take a sheet of paper (A) as a unit. Fold it into 3 equal parts. What is each part called? On the board, write the fraction name of one part. (c) How many thirds in 2 units? 2 §. How many thirds in A and B together? 1 = 3. 3 thirds yards = how many yards? (d) Read and complete : = 1. (a) At the right is a picture of a thermometer. A thermometer is used to measure temperature. (b) The lines mark the degrees. How many spaces are there between 60 degrees (60°) and 70 degrees (70°)? How many degrees? Then how many degrees are shown by each space? (c) When it gets colder, does the mercury in the tube go up or down? The freezing point of water is 32°. Is zero (0°) colder or warmer than the freezing point? How many degrees? ORAL OR WRITTEN WORK 1. How many degrees are there between the freezing point and "Summer Heat" as shown in the picture? Between "Summer Heat" and "Blood Heat"? 2. What temperature (how many degrees) is shown by the thermometer in the picture? The proper temperature for a room is 68°. Does the thermometer in the picture show that it is colder or warmer than that? How many degrees? 3. One day the mercury in our thermometer rose from 47° at 6 A.M. to 76°, at 2 P.M. Did it grow warmer or colder from 6 A.M. to 2 P.M.? How much? Measures of Time (a) Twelve o'clock at night is called midnight. How many hours are there from midnight to noon? From noon to midnight? Each day starts at midnight and ends the next midnight. How many hours are there in each day? 1 day = - hours. (b) A.M. stands for morning. P.M. stands for afternoon or evening. So 4:25 A.M. means 25 minutes past 4 in the morning. What does 4:25 P.M. mean? 4:45 P.M.? 11:50 A.M.? How many hours are there from 9 A.M. to 11 A.M.? From 11 A.M. to 1 P.M.? From 8 A.M. to 5 P.M.? (c) Look at the second hand of a watch. How many seconds does the second hand pass each minute? How many seconds are there in a minute? (d) How many minutes are there in an hour? Look at the calendar for this month. How many days are there in this month? How many in each month? How many months are there in each year? ORAL OR WRITTEN WORK 1. One morning all the trains were late. A train which should have reached the station at 8:06 arrived at 8:20. How many minutes late was it? |