(i) Finish multiplying these examples on the board: (1) 64 (2) 83 (3) 91 (4) 52 (5) 724 Notice where the figures of the product are placed. Be careful to write the figures of your products in the right places. 2. If one apple costs 2¢, how much will 5 apples cost? 3 apples? 4 apples? 7 apples? 3. What is the cost of four 2-cent stamps? 4. Ted's mother offered him 2¢ for each mouse he could catch in the barn. If he caught 8 mice, how many cents did he earn? Multiplication with 5, 2, and 0 (a) If John has no marbles and Henry has no marbles, how many marbles have the 2 boys? Of course they have no marbles. We may write this: 0 x 2 = 0; or 2 × 0 = 0. We call 0 "cipher." It means none. (b) If each of 5 boys has no marbles, all 5 boys together have no marbles. 5 × 0 = 0. Any number multiplied by 0 equals 0. (c) Multiply 60 by 5. (d) Multiply 95 by 2. 2 X 5 = 10. Write 0, carry 1. = 2 X 9 18. 5 18 and 1 are 19. 95 2 The product is 190 Product In the picture the children are playing Number Ball. This is the way it is played: John (throwing ball): 5 x 6. Alice (catching ball): 30. Paul (catching ball): 35. Paul (throwing ball): 10 x 5. When a child does not give the right answer, he loses the ball. The leader, John, then throws the ball again. Try this game. Multiplication with 10 (a) Write in columns and add: Two 10's; three 10's; four 10's; and so on. 29. A doll that costs four dimes costs 4 X 10 cents, 26. 671 28. 970 10 5 ལྕུ།། 30. A dime is 10 cents. Six dimes are cents. cents. 31. If one top costs a dime, 3 tops cost Multiplication with 4 (a) Count by 4's to 40. (b) Write in columns and add: Two 4's; three 4's; four 4's; and so on to ten 4's. (c) The multiplication table for 4 is: used with some games. Play that you spin the hand by pointing to a number. Multiply this number by 4. Another time when you play the game multiply each number by: 5, 10, 2. (e) Complete this table: |