9 . multiplication table

**Lesson 1:** Mental arithmetic

a) 9 x 1 = 9 x 5 = 9 x 4 = 9 x 10 =

9 x 2 = 9 x 7 = 9 x 8 = 9 x 0 =

9 x 3 = 9 x 9 = 9 x 6 = 0 x 9 =

b) 9 x 2 = 9 x 5 = 9 x 8 = 9 x 10 =

2 x 9 = 5 x 9 = 8 x 9 = 10 x 9 =

__Solution guide:__

Review the multiplication tables in the range learned and then fill in the results in the blanks.

a) 9 x 1 = 9 9 x 5 = 45 9 x 4 = 36 9 x 10 = 90

9 x 2 = 18 9 x 7 = 63 9 x 8 = 72 9 x 0 = 0

9 x 3 = 27 9 x 9 = 81 9 x 8 = 72 9 x 10 = 90

2 x 9 = 18 5 x 9 = 45 8 x 9 = 72 10 x 9 = 90

**Lesson 2:** Calculate

a) 9 x 3 + 9 b) 9 x 8 + 9

9 x 4 + 9 9 x 9 + 9

__Solution guide:__

- Calculate the value of multiplication.
- Add the result you just found with the remaining number.

a) 9 x 3 + 9 = 27 + 9 = 36

9 x 4 + 9 = 36 + 9 = 45

b) 9 x 8 + 9 = 72 + 9 = 81

9 x 9 + 9 = 81 + 9 = 90

**Lesson 3:** A transportation company has four fleets of vehicles. Team One has 10 cars, the other 3 teams have 9 cars each. How many cars does the company have?

__Solution guide:__

*Summary:*

Team One: 10 cars.

The remaining three teams, each team: 9 cars.

All : … cars?

- Find the number of cars of the remaining three teams: Multiply the number of cars for each team by 3.
- Calculate all cars : Take the number of cars of Team One plus the result just found.

*Solution*

The number of cars of the remaining 3 teams is:

9 x 3 = 27 (vehicle)

The company’s car number is:

10 + 27 = 37 (vehicle)

Answer: 37 cars.

**Lesson 4: **Write the result of the multiplication in the empty box (according to the pattern)

x | first | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | ten |

6 | 6 |
twelfth |
||||||||

7 | ||||||||||

8 | ||||||||||

9 |

__Solution guide:__

Multiply each number in the first column by the numbers in the first row and write the result in the corresponding blank.

x | first | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | ten |

6 | 6 |
twelfth |
18 | 24 | 30 | 36 | 42 | 48 | 54 | 60 |

7 | 7 | 14 | 21 | 28 | 35 | 42 | 49 | 56 | 63 | 70 |

8 | 8 | 16 | 24 | 32 | 40 | 48 | 56 | sixty four | 72 | 80 |

9 | 9 | 18 | 27 | 36 | 45 | 54 | 63 | 72 | 81 | 90 |

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