Spectrum Critical Thinking for Math, Grade 2

132 Pages·2017·10.054 MB·English

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Critical Thinking for Math 2
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Critical Thinking
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for Math
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Strategies and Activities
to Extend Mathematical
Understanding
•Adding and subtracting through 3-digit numbers
•Metric and customary measurement
•Components of 3-D shapes
•Working with graphs
•Fractions
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•Answer key
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carsondellosa.com/spectrum
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704618 CO 5.indd 2 6/13/19 2:27 PM
Critical Thinking for Math
Grade 2
Published by Spectrum®
an imprint of Carson-Dellosa Publishing
Greensboro, NC
705114 INT 2.indd 1 1/30/17 12:39 PM
Spectrum®
An imprint of Carson-Dellosa Publishing LLC
P.O. Box 35665
Greensboro, NC 27425 USA
© 2017 Carson-Dellosa Publishing LLC. Except as permitted under the United States Copyright Act, no part of this
publication may be reproduced, stored, or distributed in any form or by any means (mechanically, electronically,
recording, etc.) without the prior written consent of Carson-Dellosa Publishing LLC. Spectrum® is an imprint of
Carson-Dellosa Publishing LLC.
ISBN 978-1-4838-3957-8

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Table of Contents Grade 2
Chapter 1: Understanding and Using Numbers
Check What You Know . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Lessons 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
Check What You Learned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Chapter 2: Addition and Subtraction Through 20
Check What You Know . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Lessons 1-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-22
Check What You Learned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Chapter 3: Addition and Subtraction with 2-Digit Numbers
Check What You Know . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Lessons 1-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-38
Check What You Learned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Chapters 1-3 Mid-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Chapter 4: Working with 3-Digit Numbers
Check What You Know . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Lessons 1-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45-56
Check What You Learned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Chapter 5: Measurement
Check What You Know . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Lessons 1-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61-77
Check What You Learned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Chapter 6: Geometry
Check What You Know . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Lessons 1-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82-89
Check What You Learned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
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Table of Contents, continued
Chapter 7: Parts of a Whole
Check What You Know . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Lessons 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93-95
Check What You Learned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Chapters 1-7 Final Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Answer Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
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NAME
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Check What You Know
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Understanding and Using Numbers T
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Draw an array to show each equation . Then, solve the equation . R
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1 . 1 + 1 + 1 = ______ 2 . 2 + 2 = ______
3 . Count by 10s . Write the missing numbers .
20, ______, ______, ______, ______
4 . Count by 5s . Write the missing numbers .
55, ______, ______, ______, ______
5 . Count by 2s . Write the missing numbers .
74, ______, ______, ______, ______
Draw a picture to decide if the number is even or odd . Write even or odd on
the line .
6 . 16 7 . 13

____________ ____________
Spectrum Critical Thinking for Math Chapter 1
Grade 2 Check What You Know
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NAME
________________________________________________________________________________
Lesson 1.1 Grouping Objects
You can draw an array to help you write and solve equations . The apples below
are in an array with 2 rows of 3 apples . So, 3 + 3 = 6 .
3 3 6
______ + ______ = ______
Draw an array to show each equation . Then, solve the equation .
4 + 4 + 4 = ______
1 + 1 + 1 + 1 + 1 = ______
5 + 5 + 5 + 5 = ______
Spectrum Critical Thinking for Math Lesson 1 .1
Grade 2 Grouping Objects
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NAME
________________________________________________________________________________
Lesson 1.1 Grouping Objects
Draw an array to show each equation . Then, solve the equation .
4 + 4 = ______
4 + 4 + 4 + 4 = ______
5 + 5 + 5 = ______
3 + 3 + 3 + 3 + 3 = ______
Spectrum Critical Thinking for Math Lesson 1 .1
Grade 2 Grouping Objects
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NAME
________________________________________________________________________________
Lesson 1.2 Skip Counting
To skip count, take the amount you are skip counting by and add on to the
previous number .
+2 +2 +2 +2 +5 +5 +5 +5 +10 +10 +10 +10
2 4 6 8 10 5 10 15 20 25 10 20 30 40 50
Count by 2 . Write the missing numbers .
20, ______, ______, ______, 28, ______, ______, ______, 36
Count by 5 . Write the missing numbers .
35, ______, ______, ______, 55, ______, ______, ______, 75
Count by 10 . Write the missing numbers .
______, ______, ______, 60, ______, ______, ______, 100
Spectrum Critical Thinking for Math Lesson 1 .2
Grade 2 Skip Counting
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