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Copyright © by William H. Sadlier, Inc. All rights reserved.

Catherine D. LeTourneau

Alfred S. Posamentier

with

Elinor R. Ford

Madelaine Gallin

Former Math Coordinator

Community School District #6

New York, NY

Lucy Lugones

Math Coordinator

St. Luke's School

Whitestone, NY

Tim Mason

District Math Resource Teacher

Palm Beach County School District

West Palm Beach, FL

卡摬楥r-Oxford

A Division of William H. Sadlier, Inc.

www.sadlier-oxford.com

The publisher gratefully acknowledges Rose Anita McDonnell (1905–2003)

and her colleagues for the important role they played in the development of

Progress in Mathematics for more than sixty years.

The authors and editors wish to thank the following Grade 1 teachers and

administrato Copyright © by William H. Sadlier, Inc. All right The publisher gratefully acknowledges Rose Anita Dear Second Grader, Do you know why math is impor Progress in Mathematics, now in its sixth decade Welcome to Math . . . . . . . . . . . . . . . . . Place Value to 100 Theme: Rainforest Chapte Data and Graphs: Using Operations Copyright © by Addition: Two-Digit Numbers Theme: Places to Go Subtraction: Two-Digit Numbers Copyright © by Wi Geometry Theme: Shapes Around Us Chapter Ope Money and Time Copyright © by William H. Sadlier Place Value to 1000 Theme: Inventions and Disco Addition and Subtraction: Three-Digit Numbers Co Fractions and Probability Theme: Party and Game Measurement Copyright © by William H. Sadlier, I Multiplication and Division Theme: Collections Contents Copyright © by William H. Sadlier, Inc. can add to 10. 4 +3 7 4+3=7 Add. 1. can subtract facts to 10. 10 º4 knows number words to twenty. zero Compare 19 to 16. Show each number with can comp can tally. This tally chart shows how many bags o can add tens. 3 ones + 5 ones = 8 ones G can identify plane figures. circles tri can tell time. I can name the hour. 1011 12 1 can identify equal parts of a whole. This circle can measure length. about 5 Write abou Each bag has 5 marbles. These groups are equal. Use this strategy: Write a number sentence. Thi Here are some problem-solving 20 points M gh y Moun a n it ti Get Your Tic Dear Fam il , Name Find the sum. 16. 33 +1 6 49 Remember to add the Add Ones and Tens Name 24 + 14 = ? PAGE INTENTIONALLY LEFT BLANK Count on by ones or tens. Add mentally. 10. 4 Name There are more than 9 ones. Regroup the o Regroup 10 ones as 1 ten. Use models to reg Regroup Ones as Tens: Name Use Models Th PAGE INTENTIONALLY LEFT BLANK Name Find Hidden Information · Sometimes you ne Find Hidden Information Kevin looked at 15 books Name Al finds 27 shells at the beach. Rose fin Find the sum. Circle the ones you regroup. 6. ten Regroup Ones as Tens: Name Model and Record PAGE INTENTIONALLY LEFT BLANK Find the sum. Regroup where needed. 14. 1 15 Regroup Ones as Tens Name 34 + 17 = ? A PAGE INTENTIONALLY LEFT BLANK Name Fill in the circle under the correct answer. 11. Name Estimate the sum. Remember: Line up the tens and ones. Rewrite the Rewrite Two-Digit Name Addition PAGE INTENTIONALLY LEFT BLANK Name Add. Regroup where needed. Count On Group Do Name Fill in the circle under the correct answer. 9. Add: Name Find the sum. Choose the method that works better Name Find the sum. Regroup where needed. 22. 6 1 14 Name Use More Than One Step Tim finds 12 smooth Use More Than One Step 4. 18 ducks are in the pa Problem-Solving Strategy: Name Use More T PAGE INTENTIONALLY LEFT BLANK Name Mixed Strategies Use a strategy you have Use a strategy you have learned. 6. On Friday 32 Name Name Math and Social Studies The Four Corners Name 1. Add mentally. Add 2 to: Add. 9. 57 +29 10. 77 +13 11. 82 +17 Name Name Magic Squares Name Fill in the circle under the correct answer. 9. J