Six-digit numbers

### 1.1. Knowledge to remember

**a) Unit – Tens – Hundred **

1 unit. Write the number 1

1 dozen. Write number: 10

1 hundred. Write number: 100

**b)** **Thousand – tens of thousands – hundred thousand**

10 hundred = 1 thousand. Write number: 1000

10 thousand = 1 ten thousand. Write the number 10 000

10 tens of thousands = 100 thousand. Write number: 100 000

Write number: 432516

Read the number: Four hundred thirty-two thousand five hundred and sixteen.

### 1.2. Textbook exercise solution page 9

**Lesson 1:** Write according to the pattern

a) Model

Write number: 313 21.

Read number: Three hundred and thirteen thousand two hundred and fourteen

b)

**Solution guide:**

b) Fill in the blank cells of the row from left to right in turn as follows: 5; 2; 3; 4; 5; 3.

Write number: 523 453.

Read number: Five hundred twenty-three thousand four hundred and fifty-three.

**Lesson 2:** Write according to the pattern

Write numbers | Hundred thousand | Tens of thousands | thousand | hundred | Dozen | Unit | Read number |

425 671 | 4 | 2 | 5 | 6 | 7 | first | Four hundred twenty-five thousand six hundred and seventy-one |

369 815 | |||||||

5 | 7 | 9 | 6 | 2 | 3 | ||

Seven hundred and eighty-six thousand six hundred and twelve |

__Solution guide:__

- To read natural numbers we read from left to right, or from high to low.
- The digits from right to left belong to units, tens, hundreds, thousands, tens of thousands, hundreds of thousands, respectively.

Write numbers | Hundred thousand | Tens of thousands | thousand | hundred | Dozen | Unit | Read number |

425 671 | 4 | 2 | 5 | 6 | 7 | first | Four hundred twenty-five thousand six hundred and seventy-one |

369 815 | 3 | 6 | 9 | 8 | first | 5 | Three hundred and sixty-nine thousand eight hundred and fifteen |

579 623 | 5 | 7 | 9 | 6 | 2 | 3 | Five hundred and seventy-nine thousand six hundred twenty-three |

786 612 | 7 | 8 | 6 | 6 | first | 2 | Seven hundred and eighty-six thousand six hundred and twelve |

**Lesson 3:** Read the following numbers: 96 315; 796 315; 106 315; 106 827.

__Solution guide:__

- To read natural numbers we read from left to right, or from high to low.

96 315 reads as: ninety-six thousand three hundred and fifteen;

796 315 reads as: seven hundred and ninety-six thousand three hundred and fifteen;

106 315 reads as: one hundred and six thousand three hundred and fifteen;

106 827 reads: one hundred and six thousand eight hundred twenty-seven.

**Lesson 4: **Write the following numbers

a) Sixty-three thousand one hundred and fifteen;

b) Seven hundred twenty-three thousand nine hundred thirty-six;

c) Nine hundred and forty-three thousand one hundred and three;

d) Eight hundred and sixty thousand three hundred and seventy-two.

__Solution guide:__

- Based on how to read and write the given numbers. When writing numbers, we write the digits from the high row to the low row.

a) 63 115 b) 723 936

c) 943 103 d) 860 372.

### 1.3. Solve the textbook exercises page 10

**Lesson 1:** Write according to the pattern

Write numbers | Hundred thousand | Tens of thousands | thousand | hundred | Dozen | Unit | Read number |

653 267 | 6 | 5 | 3 | 2 | 6 | 7 | six hundred fifty-three thousand two hundred and sixty-seven |

4 | 2 | 5 | 3 | 0 | first | ||

Seven hundred twenty eight thousand three hundred and nine | |||||||

425 736 |

__Solution guide:__

- To read natural numbers we read from left to right, or from high to low.
- The digits from right to left belong to units, tens, hundreds, thousands, tens of thousands, hundreds of thousands, respectively.

Write numbers | Hundred thousand | Tens of thousands | thousand | hundred | Dozen | Unit | Read number |

653 267 | 6 | 5 | 3 | 2 | 6 | 7 | six hundred fifty-three thousand two hundred and sixty-seven |

425 301 | 4 | 2 | 5 | 3 | 0 | first | Four hundred twenty-five thousand three hundred and one |

728 309 | 7 | 2 | 8 | 3 | 0 | 9 | Seven hundred twenty eight thousand three hundred and nine |

425 736 | 4 | 2 | 5 | 7 | 3 | 6 | Four hundred twenty-five thousand seven hundred thirty-six |

**Lesson 2:**

a) Read the following numbers: 2453; 65 243; 762 543; 53 620.

b) Indicate in which row the digit 5 in each of the numbers above belongs.

__Solution guide:__

- To read natural numbers we read from left to right, or from high to low.
- The digits from right to left belong to units, tens, hundreds, thousands, tens of thousands, hundreds of thousands, respectively.

a) The number 2453 reads: two thousand four hundred fifty-three.

The number 65 243 reads: sixty-five thousand two hundred and forty-three.

The number 762 543 reads: seven hundred and sixty-two thousand five hundred forty-three.

The number 53 620 reads: fifty-three thousand six hundred and twenty.

b) The digit 5 of 2453 is in the tens.

The digit 5 out of 65 243 is in the thousands.

The digit 5 of 762 543 is in the hundreds.

The digit 5 out of 53 620 is in the tens of thousands.

**Lesson 3: **Write the following numbers

a) Four thousand three hundred;

b) Twenty-four thousand three hundred and sixteen;

c) Twenty-four thousand three hundred and one;

d) One hundred and eighty thousand seven hundred and fifteen;

e) Three hundred and seven thousand four hundred and twenty-one;

g) Nine hundred and ninety-nine thousand nine hundred and ninety-nine.

__Solution guide:__

- Based on how to read and write the given numbers. When writing numbers, we write the digits from the high row to the low row.

a) 4300 d) 180 715

b) 24 316 e) 307 421

c) 24 301 g) 999 999.

**Lesson 4: **Write the appropriate numbers in the dot

a) 300 000; 400 000; 500 000 ; … ; … ; … .

b) 350 000; 360 000; 370 000 ; … ; … ; … .

c) 399 000; 399 100; 399 200 ; … ; … ; … .

d) 399 940; 399 950; 399 960 ; … ; … ; … .

e) 456 784; 456 785; 456 786 ; … ; … ; … .

__Solution guide:__

- Based on the given numbers to determine the rule of that sequence, from which we can find the next numbers.
- Example series a: two consecutive numbers are more than (or less than) 100 000 units from each other.

a) 300 000; 400 000; 500 000;600 000; 700 000; 800 000.

b) 350 000; 360 000; 370 000; 380 000; 390 000; 400 000.

c) 399 000; 399 100; 399 200; 399 3000; 399 400; 399 500.

d) 399 940; 399 950; 399 960; 399 970; 399 980; 399 990.

e) 456 784; 456 785; 456 786; 456 787; 456 788; 456 789.

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