Workbook Prathomsuksa 2 © Pelangi Publishing (Thailand) Co., Ltd. 2022 All rights reserved. No part of this publication may be reproduced, stored in any retrieval system or transmitted in any form or by any means without permission of Pelangi Publishing (Thailand) Co., Ltd. 2022
BJRC362031_GoGetMaths WB Prelimpage P2.indd 1
885-87220-0350-0 First Published 2022
5/11/2564 BE 12:12
Contents Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6
Chapter 7 Chapter 8 Chapter 9 Chapter 10 Chapter 11
Numbers to 1,000
1
Practices Think
1 16
Addition and subtraction within 1,000
17
Practices Think
17 41
Length
42
Practices Think
42 52
Mass
53
Practices Think
53 64
Volume and capacity
65
Practices Think
65 77
Multiplication
78
Practices Think
78 101
Revision 1
102
Division
109
Practices Think
109 124
Mixed operations
125
Practices Think
125 138
Time
139
Practices Think
139 163
Shapes and patterns
164
Practices Think
164 174
Picture graphs
175
Practices Think
175 181
Revision 2
182
Chapter 1
Numbers to 1,000
Practice 1
Counting to 1,000
1. Fill in the blanks. Hindu-Arabic numerals .g.
Thai numerals
Hindu-Arabic words
145
one hundred and forty-five
436
four hundred and thirty-six
791
seven hundred and ninety-one
224
two hundred and twenty-four
1,000
one thousand
373
three hundred and seventy-three
531
five hundred and thirty-one
999
nine hundred and ninety-nine
874
eight hundred and seventy-four
๑๔๕ ๔๓๖ ๗๙๑ ๒๒๔ ๑,๐๐๐ ๓๗๓ ๕๓๑ ๙๙๙ ๘๗๔
2. Count on in hundreds. Fill in the blanks. .g.
1,000
100
300
200
900
800
500
400
700
600
Chapter 1 | 1
3. Count. Write the numbers. .g.
100
100
345 100
a
100
289
100
b 100
100
100
100
743 100
100
100
c 100
100
100
567 100
100
2 | Mathematics Prathomsuksa 2
4. How many building blocks are there? Count and write. .g.
a
158 b
374 c
634 d
423 e
903
860 Chapter 1 | 3
5. Fill in the blanks. .g.
2 hundreds
5 tens
254
=
2
254
= 200 +
5
hundreds 50
4 ones tens
4
ones
4
+
a
4 hundreds
6 tens
468
=
4
468
= 400 +
6
hundreds 60
8 ones tens
8
ones
8
+
b
3 hundreds
9 tens
391
=
391
= 300 +
4 | Mathematics Prathomsuksa 2
3
9
hundreds 90
1 one
+
tens 1
1
one
c
8 hundreds
7 tens
879
=
8
879
= 800 +
7
hundreds 70
9 ones tens
9
ones
9
+
d
9 hundreds
8 tens
980
=
9
980
= 900 +
8
hundreds 80
0 one
+
tens
0
one
0 Chapter 1 | 5
6. Match the boxes that give the same value. .g.
196
7 hundreds 2 tens 0 one
1 hundred 9 tens 6 ones
600 + 0 + 1
100 + 90 + 6
700 + 20 + 0
720
601
963
4 hundreds 5 tens 4 ones
900 + 60 + 3
6 hundreds 0 ten 1 one
300 + 70 + 8
454
378
9 hundreds 6 tens 3 ones
3 hundreds 7 tens 8 ones
400 + 50 + 4
6 | Mathematics Prathomsuksa 2
7. Fill in the blanks. .g.
563
The digit
3
is in the ones place. Its value is
3
The digit
5
is in the hundreds place. Its value is
The digit
6
is in the tens place. Its value is
60
.
The digit
0
is in the ones place. Its value is
0
.
The digit
7
is in the tens place. Its value is
70
.
The digit
4
is in the hundreds place. Its value is
The digit
0
is in the tens place. Its value is
0
.
The digit
3
is in the ones place. Its value is
3
.
The digit
2
is in the hundreds place. Its value is
200 .
The digit
9
is in the hundreds place. Its value is
900 .
The digit
4
is in the tens place. Its value is
40
.
The digit
1
is in the ones place. Its value is
1
.
. 500 .
a
470
400 .
b
203
c
941
Chapter 1 | 7