DRILL - ADDITION AND SUBTRACTION 1. Begin with zero and add by tens to 100, thus: 10, 20,30, etc. Subtract by tens from 100, thus: 90,80, etc. 2. Begin with zero and add by fives to 100, thus: 5, 10, 15, etc. Subtract by fives from 100, thus: 95, 90, etc. 3. "A chain is as strong as its weakest link." Test the strength of this chain by adding quickly the two numbers in each link. 4. Add up, then down: 5. Subtract quickly : MULTIPLYING BY 3 3×1=3 3×4=12 1×3=3 4×3=12 ////// /// /// /// //// //// // // 3 twos are 6 3 threes are 9 3 fours are 12 3X2=6 3X3 = 9 1. Count by 3's to 18. 3 X 4 = 12 2. Show with splints three 5's; five 3's. Notice that 3×5=5× 3. 3.3×2=2×? 3×4=4x? 3×6=6x? 4. In a classroom there were 3 rows of girls and 6 girls in each row. How many girls were there? 5. How much will 3 pears cost at 4 cents each? 6. A strip of carpet is 3 yards long. What is its length in feet? 7. How many pencils are there in 3 packages, each containing half a dozen? 8. How much will 3 cards cost at 5 cents each? 9. John bought 6 pens at 3 cents each and gave in payment a quarter. How much change did he receive? 10. Find with splints the answers to the following: ROMAN NUMBERS — TELLING TIME 1. Read from the clock face the Roman number for 6, 8, 9, 3, 2, 7, 5, 10, 4. On clock faces IIII is used for IV. 2. Write in Roman numbers, 9. Show what change in the letters will make 11. 3. Read the Roman number for 12. The short hand on the clock is called the hour hand. The long hand is called the minute hand. 4. What time is it by the clock in the picture? 5. Make a clock face of cardboard and place the hands to show nine o'clock. 6. Move the hour hand to ten. What time is it? 7. Move the hour hand to four. What time is it? 8. Place the hands to show five o'clock; two o'clock; seven o'clock. 9. Show the position of the hands at 30 minutes after 9; at 30 minutes after 10; at 30 minutes after 11. 10. What time is it when the minute hand is at VI and the hour hand between I and II? 11. Place the hands to show at what time you get up in the morning. 1. // // // // Count the splints by twos. 2. How many splints are there? 3. Into how many groups are the splints divided? 4. Compare the groups as to the number in each. 5. Each group is called 1 of 8. 6. How many splints are there in 1 of 8 splints? /// /// 1 of 12 splints is 7. /// 8. What name is given to each group? 9. Put 16 splints in 4 equal groups. What is 1 of 16? 10. How could you find 1 of 20 children? 11. How many inches are there in 1 of a foot? 12. How many buttons are 1 of a dozen? 13. I divided 20 cents equally among four boys. How much did each receive? 14. What is the cost of a quarter of a pound of cheese at 16 cents a pound? 15. Margaret had 8 lemon drops. She ate + of them. How many had she left? 16. Which is greater, 1 of 8 or of 8? 17. Complete: + of 8=?+ of 12=? 4 of 16 =? 1 of 20=? 4 For this exercise use real measures. 1. Fill the pint measure with water and empty it into the quart measure. Do this a second time. You have shown that LIQUID MEASURE Pint Quart 2 pints equal 1 quart. 2. A quart is how many times a pint? 3. A pint is what part of a quart? 4. How many times can the teacher fill Mary's half-pint milk bottle from the pint measure? 5. Charles gets a pint of milk each morning and evening. How many pints does he get in 2 days? 6. He pays 4 cents for a pint of milk. How much does he pay for a quart? 7. Raymond delivers each day 3 quart bottles of milk. How many pints does he deliver? 8. Henry goes to the store for 2 quarts of molasses. How many pints does he get? 9. At 6 cents a pint, how much will a quart cost? |