Table of numbers from 1 to 100

### 1.1. Knowledge to remember

Recognize that 100 is the successor of 99.

– Read, write, make tables of numbers from 0 to 100.

– Know some characteristics of the numbers in the table.

### 1.2. Maths on Tables of numbers from 1 to 100

**Form 1: Number 100**

The number 100 is the largest number in the sequence from 0 to 100 and is the next number of 99 .

**Form 2: Some characteristics of the numbers in the table.**

– Single digit numbers are numbers in the range 0 to 9.

– The round numbers are: 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100

– The smallest two-digit number is 10, the largest two-digit number is 99.

– Numbers with the same two digits are 11; 22; 33; 44; 55; 66; 77; 88; 99…

**Form 3: The number before and the next number of a number.**

– The preceding number of a number is the number that stands in front of that number when counting down and has a value 1 unit less than that number.

– The next number of a number is the number that comes immediately after that number when counting down and has a value of 1 more than that number.

### 1.3. Solving Textbook Exercises page 145

**Lesson 1 page 145**

The next number of 97 is…..

The next number of 98 is:…..

The next number of 99 is:….

**Solution method**

The next number of a is one unit larger than a.

__Solution guide__

The next number of 97 is 98 .

The next number of 98 is: 99

The next number of 99 is 100.

**Lesson 2 page 145**

Write the missing number in the blank in the table of numbers from 1 to 100:

__Solution method__

Count up the numbers from 1 and then fill in the missing numbers in the blank cells in the table.

__Solution guide__

**Lesson 3 page 145**

In the table of numbers from 1 to 100:

a) Single-digit numbers are ……………………………………………………….. ………….

b) The rounded numbers are: …………………………… ……….

c) The smallest two-digit number is: ……………………………………………………….. …………

d) The largest two-digit number is: ……………………………………………………….. ……….

d) The two-digit numbers that are the same are: 11, 22………………………….

__Solution method__

– Rounded numbers have the unit digit equal to 0.

– Read the question carefully and then list the numbers as required.

**Solution guide**

a) The single digit numbers are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.

b) The round numbers are: 10, 20, 30, 40, 50, 60, 70, 80, 90.

c) The smallest two-digit number is: 10

d) The largest two-digit number is: 99

dd) Numbers with the same two digits are: 11, 22, 33, 44, 55, 66, 77, 88, 99.

### 1.4. Solving Textbook Exercises page 146

**Lesson 1 page 146**

Thirty-three, ninety, ninety-nine, fifty-eight, eighty-five, twenty-one, seventy-one, sixty-six, one hundred.

**Solution method**

Identify the hundreds, tens, and units digits of each number and write the appropriate numbers.

__Solution guide__

The numbers are: 33, 90, 99, 58, 85, 21, 71, 66, 100.

**Lesson 2 page 146**

Write numbers:

a) The preceding number of 62 is:…….. ; The preceding number of 61 is………

The preceding number of 80 is……… ; The preceding number of 79 is ………

The preceding number of 99 is……… ; The preceding number of 100 is ………

b) The next number of 20 is: …………; The next number of 38 is: …………;

The next number of 75 is :………; The next number of 99 is: ………….

c)

Previous Number Known Number Next Number

44 45 46

69

99

__Solution method__

a) The preceding number of a is one less than a.

b) The next number of a is one more than a.

c) Find the number before and after the given number and then fill in the table.

__Solution guide__

a) The preceding number of 62 is: 61; The preceding number of 61 is 60 ;

The preceding number of 80 is 79 ; The preceding number of 79 is 78 ;

The preceding number of 99 is 98; The preceding number of 100 is 99.

b) The next number of 20 is: 21; The next number of 38 is: 39;

The next number of 75 is: 76; The next number of 99 is: 100.

c)

Previous Number Known Number Next Number

44 45 46

68 69 70

98 99 100

**Lesson 3 page 146**

Write the numbers:

From 50 to 60: ……………………………………………………………………… ………….

From 85 to 100: ……………………………………………………………………… …………

__Solution method__

Count down the numbers and write in the blanks.

__Solution guide__

From 50 to 60: 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60.

From 85 to 100: 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100.

**Lesson 4 page 146**

__Solution method__

Use a straightedge to connect the given points to form two squares.

A square has equal sides.

**Solution guide**

### 1.5. Solving Textbook Exercises page 147

**Lesson 1 page 147**

Write the numbers:

a) From 15 to 25 …………………………………………………………………. ………….

b) From 69 to 79 …………………………………………………………………. ………….

**Solution method**

Count down the numbers and write in the blanks.

__Solution guide__

a) From 15 to 25: 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25.

b) From 69 to 79: 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79.

**Lesson 2 page 147**

Read each of the following numbers: 35, 41, 64, 85, 69, 70.

__Solution method__

Read each number in turn from left to right.

__Solution guide__

35: read as thirty-five.

41: read as forty-one.

64: read as sixty-four.

85: read as eighty-five.

69: read as sixty-nine.

70 reading is seventy.

**Lesson 3 page 147**

Fill in the blanks with appropriate <, >, = signs:

a) 72……76 b) 85……65 c) 15………10 + 4

85…..81 42…….76 16………10 + 6

45…..47 33…….66 18……… 15 + 3

__Solution method__

– Calculate the value of the sides.

– Compare pairs of tens digits and then pairs of units digits.

__Solution guide__

a) 72 < 76 b) 85 > 65 c) 15 > 10 + 4

85 > 81 42 < 76 16 = 10 + 6

45 < 47 33 < 66 18 = 15 + 3

**Lesson 4 page 147**

There are 10 orange trees and 8 lemon trees. How many trees are there in all?

__Solution method__

**Summary:**

Oranges: 10 trees

Lemon: 8 plants

All: … trees?

To find the solution, we add the number of orange trees plus the number of lemon trees.

__Solution guide__

The total number of trees is:

10 + 8 = 18 (tree)

Answer: 18 trees.

**Lesson 5 page 147**

Write the largest two-digit number

__Solution method__

Choose a number with tens and units of 9.

**Solution guide**

The largest two-digit number is: 99.

.

=====

## Leave a Reply