![]() This unit covers adding without regrouping to 100 and 120, adding with regrouping to 10, subtracting multiples of 10, mentally adding and subtracting 10. Students will be able to model numbers in different ways using number bonds and place value charts, compose and decompose two-digit numbers, and recognize patterns. Students will learn counting, comparing, and understanding place value of numbers to 100 and 120 by emphasizing tens and ones. In this unit students will use and extend their prior knowledge of the strategies they learned in the units on numbers to 40. This unit covers place value of numbers to 100, place value of numbers to 120, comparing numbers within 100. Students will learn to add and subtract one-digit numbers from two-digit numbers within 40. These strategies are built on the previously learned strategies in Singapore Math 1a of addition to 20 and subtraction to 20. Students will learn strategies for addition and subtraction within 40. This unit covers addition without regrouping to 40, addition with regrouping to 40, subtraction without regrouping to 40, and word problems. Students will be able to model numbers in different ways using number bonds, words, and place value charts. 2 tens make 20, 3 tens make 30, and 4 tens make 40. Students will learn how to count tens, i.e. Learning will be focused on counting, comparing, and the structures of numbers to 40. This unit marks beginning of Singapore Math 1b and it covers topics of counting to 40, place value of numbers to 40, and comparing and ordering numbers within 40. Making 10 is a foundational skill that supports mathematical concepts of place value, standard algorithm and algebraic thinking. Students will learn to decompose numbers using number bonds, make ten and then add to a ten. This unit covers the main strategy taught in Singapore Math 1a, namely, making a 10. This unit covers topics of relating counting to addition and subtraction, adding within 20, subtracting within 20, addition and subtraction word problems, and adding three numbers. These lessons review and extend counting numbers from 11 to 20 by emphasizing place value and structure of “ten and some more.” Students will learn add and subtract within 20 without regrouping and compare numbers within 20 using comparison language: “greater or more than,” “less or fewer than,” and “the same as.” This unit covers place value of numbers to 20, comparing numbers within 20, making patterns and ordering numbers within 20. Lessons involving number bonds are important to cover because students will be using number bonds to add and subtract two- and three-digit numbers in future lessons through upper elementary grades. These students may be ready to cover lessons on place value of numbers to 20. Students who have mastered basic number skills may progress quickly through the lessons covering ways to add and subtract and making fact families. This unit covers ways to add and subtract, making fact families, understanding the equal sign, and properties of addition and subtraction. ![]() Numbers to 40, addition and subtraction to 40, Numbers to 120, addition and subtraction to 120, length, time, representing and interpreting data, and reasoning with shapes. Understanding addition and subtraction, numbers to 20, addition and subtraction within 20. For your reference, the following topics in our curriculum correspond to Singapore Math grade level 1A and 1B: Singapore Math 1a In the few instances where 1 st grade level units don’t exactly align between our curriculum and textbooks, you will still be able to easily locate the corresponding unit in our online math program by referring to the table of contents one grade below or above. Our program may introduce some topics one grade level earlier or postpone coverage of some topics until Grade 2. Our online K-5 mathematics curriculum is aligned with all standard Singapore Math textbook series and it includes all content that these series cover, from grade K through grade 5. Please note that our virtual Singapore Math Grade 1 curriculum is spiral and it provides for the review of the important concepts that students learned in Kindergarten.
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