Page 4 - 新思维数学活动用书3 样章

How to use this book

How to use this book

This workbook provides questions for you to practise what you

have learned in class. There is a unit to match each unit in

your Learner’s Book. Each exercise is divided into three parts:

• Focus: these questions help you to master the basics

• Practice: these questions help you to become more confident in
using what you have learned
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Addition,
• Challenge: these questions will make you think more deeply.
You might not need to work on all three parts of each exercise.
subtraction and money
Your teacher will tell you which parts to do.

You will also find these features:

3.1 Addition
Important words that compose decompose
exchange regroup single
Exercise 3.1
you will use.
Focus 1 Numbers to 1000
1 Complete each addition. Show how you found each total.
Worked example 1
Step-by-step examples showing a Draw beads on the abacus to show this 3-digit number.
24 + 5
42 + 5
=
=
way to solve a problem. 2 0 3
6 0 0 100s 10s 1s 1.1 Hundreds, tens and ones
Draw six beads on the 100s tower to
48 + 9 37 + 8 Now write this number in words.
represent 600.

=
= There are often 100s 10s 1s
many different 4 What 3-digit numbers are represented below?
Draw two beads on the 10s tower to represent 20.
a
2 Complete each addition. Show how you found each total.
123 + 6 ways to solve a 100s 10s 1s
153 + 5
=
= problem. Draw three beads on the 1s tower for 3.
b 100s Together, the beads represent the 3-digit

1s
10s
number 623.
100s 10s 1s 623
These questions will help you
235 + 8
254 + 7
develop your skills of thinking 5 What is the value of the ringed digit in each 3-digit number?
=
=

and working mathematically. 1 64 23 7
31 5 1 2 8
4 52 3 8 1
Which hundreds values have not been used in these numbers?

8 3
Practice
33
6 Write the numbers in the next row of the 1 to 1000 strip.

351 352 353 354 355 356 357 358 359 360

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