Numbers 111 to 200

### 1.1. Knowledge to remember

Counting, reading, writing and comparing numbers from 111 to 200

### 1.2. Math forms

**Type 1: Read and write numbers**

– Read numbers in order of rows from left to right.

– From reading numbers, I write the digits corresponding to the rows and then write numbers.

**Form 2: Compare**

Numbers with fewer digits have a smaller value.

– Numbers with the same number of digits compare rows from left to right.

**Form 3: Order of numbers from 111 to 200**

Memorize the order of numbers in the range 111 to 200.

### 1.3. Solving Textbook Exercises

**Lesson 1**

Write (in the form):

__Solution method__

Read numbers in order from hundreds to units.

__Solution guide__

**Lesson 2**

Number?

__Solution method__

Count up the numbers and fill in the missing number in the number line.

__Solution guide__

**lesson 3**

Enter the sign >; <; = in the dot:

123…124 120…152

129…120 186….186

126…122 135…125

136…136 148…128

155…158 199…200

__Solution method__

Compare pairs of digits in the same row in order from left to right and then fill in the blanks with the appropriate sign.

__Solution guide__

123 < 124 120 < 152

129 > 120 186 = 186

126 > 122 135 > 125

136 = 136 148 > 128

155 < 158 199 < 200

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