This set of worksheets is part of our series to support teachers and students using Singapore Strategies.
This pack can be used as a stand-alone product, or as a supplement to your core math curriculum. It can also be used to promote higher order thinking where students are challenged to transfer their basic skills to more demanding questions. The specified item introduced from the Common Core Standards are indicated on each page.
Addition to 20
This worksheet can be used to supplement
Math in Focus Workbook 1A
Chapter 7 Numbers to 20 (pages 161 to 190)
Chapter 8 Addition and Subtraction Facts to 20 (pages 191 to 202)
Primary Mathematics Series (Common Core Edition 1A)
Chapter 6 Numbers to 20 (pages 95 to 106)
Chapter 6 Numbers to 20 (pages 107 to 114)
Total pages: 59
The topics include:
Operations & Algebraic Thinking (1.OA)
Represent & solve problems involving addition & subtraction
A1: Addition and subtraction within 20 to solve word problems
A2: Word problems that call for addition of three whole numbers whose sum is less than or equal to 20
Understand and apply properties of operations and the relationship
between addition and subtraction.
B3: Apply properties of operations as strategies to add and subtract.
B5: Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).
Add and subtract within 20.
C5: Relate counting to addition and subtraction
C6: Add and subtract. Use strategies such as counting on, making ten, relationship between addition and subtraction. Specifically, this set of worksheets uses Singapore Math strategies such as number bonds for addition, subtraction and setting family of number sentences.
Number and Operations in Base Ten (1.NBT)
Extend the counting sequence
A1: Count to 120, read and write numerals and represent a number of objects with a written numeral. (count to 20 in this worksheet)
Understand place value.
B2: Understand that the two digits of a two-digit number represent amounts
of tens and ones. Understand the following as special cases:
a. 10 can be thought of as a bundle of ten ones — called a “ten.”
b. The numbers from 11 to 19 are composed of a ten and one, two,
three, four, five, six, seven, eight, or nine ones.
B3: Compare two two-digit numbers based on meanings of the tens and ones
digits, recording the results of comparisons with the symbols >, =, and <.