The 6, 7, 8 and 9 tables

In Primary 2, you learned that 4 times 5 means 4 groups of 5. 4 groups of 5 make 20. Today, we will build the multiplication tables of 6, 7, 8 and 9 by adding one more group each time. Orchids are planted in 7 rows. There are 6 orchids in each row. How many orchids are there? There are 7 rows, with 6 orchids in each row. Here is the first row of 6 orchids. One row is one group of 6. 1 group of 6 is 6. So 1 times 6 is 6. Row 2 adds 6 more orchids. 6 plus 6 is 12. So 2 times 6 is 12. Each new row adds 6 more. Row 3 adds 6 more orchids. 12 plus 6 is 18, so 3 times 6 is 18. Row 4 adds 6 more orchids. 18 plus 6 is 24, so 4 times 6 is 24. Row 5 adds 6 more orchids. 24 plus 6 is 30, so 5 times 6 is 30. Row 6 adds 6 more orchids. 30 plus 6 is 36, so 6 times 6 is 36. Row 7 adds 6 more orchids. 36 plus 6 is 42, so 7 times 6 is 42. So there are 42 orchids. The multiplication tables of 7, 8 and 9 grow the same way, adding 7, 8 or 9 each time.

A box of chocolates has 5 rows. There are 7 chocolates in each row. How many chocolates are in the box? Try it first. Pause if you like. There are 5 rows, with 7 chocolates in each row. Here is the first row of 7 chocolates. 1 group of 7 is 7. So 1 times 7 is 7. Row 2 adds 7 more chocolates. 7 plus 7 is 14, so 2 times 7 is 14. Row 3 adds 7 more chocolates. 14 plus 7 is 21, so 3 times 7 is 21. Row 4 adds 7 more chocolates. 21 plus 7 is 28, so 4 times 7 is 28. Row 5 adds 7 more chocolates. 28 plus 7 is 35, so 5 times 7 is 35. So there are 35 chocolates in the box.

A gardener plants 5 rows of 9 seedlings. That is 45 seedlings. Then she plants 1 more row of 9 seedlings. How many seedlings are there now? Try it first. Pause if you like. There are 5 rows, and then 1 more row, with 9 seedlings in each row. Here are the 5 rows she planted first. The question tells us that 5 rows have 45 seedlings. So 5 times 9 is 45. We already know these 45 seedlings. One more row adds 9 more seedlings. 45 plus 9 is 54, so 6 times 9 is 54. So there are 54 seedlings now. One more group adds the number in each group. That is how the multiplication tables of 6, 7, 8 and 9 grow.