Click to edit Master text styles – Second level Third level – Fourth level » Fifth level Two Digit Addition and Subtraction Parent Quick Smarts :Grade 1 Unit 9 Providing You the Smarts to Help Your Child Succeed

Click to edit Master text styles – Second level Third level – Fourth level » Fifth level Standard Algorithm Use our understanding of numbers to add in a variety of ways tens +2 tens = 5 tens or 50. Seven more than 50 is 57.

Click to edit Master text styles – Second level Third level – Fourth level » Fifth level Florida Content Standard: Add within 100 using concrete models or drawings and strategies; subtract multiples of 10; explain the reasoning used for the strategy. Possible Addition & Subtraction Scenarios for First Graders Addition Within A two-digit number plus a one-digit number- A two-digit number plus a decade number Ex Ex A decade number plus a decade number- A two-digit number plus a two-digit number Ex Ex Subtraction – A decade number (10-90) from another decade number (10-90). Ex

Click to edit Master text styles – Second level Third level – Fourth level » Fifth level Explore Addition and Subtraction Through: Hundreds Chart Florida Content Standard: Add within 100 using concrete models or drawings and strategies; subtract multiples of 10; explain the reasoning used for the strategy.

Click to edit Master text styles – Second level Third level – Fourth level » Fifth level Explore Addition and Subtraction Through: Hundreds Chart Models Tens Ones Florida Content Standard: Add within 100 using concrete models or drawings and strategies; subtract multiples of 10; explain the reasoning used for the strategy.

Click to edit Master text styles – Second level Third level – Fourth level » Fifth level Explore Addition and Subtraction Through: Hundreds Chart Models Open Number Lines Florida Content Standard: Add within 100 using concrete models or drawings and strategies; subtract multiples of 10; explain the reasoning used for the strategy.

Click to edit Master text styles – Second level Third level – Fourth level » Fifth level Open Number Lines Builds on relationships between numbers Strengthens understanding of place value and its connection to addition and subtraction. Improves mental math skills. Florida Content Standard: Add within 100 using concrete models or drawings and strategies; subtract multiples of 10; explain the reasoning used for the strategy.

Click to edit Master text styles – Second level Third level – Fourth level » Fifth level Open Number Lines Develop own solution strategy Florida Content Standard: Add within 100 using concrete models or drawings and strategies; subtract multiples of 10; explain the reasoning used for the strategy.

Click to edit Master text styles – Second level Third level – Fourth level » Fifth level Open Number Lines Develop own solution strategy Florida Content Standard: Add within 100 using concrete models or drawings and strategies; subtract multiples of 10; explain the reasoning used for the strategy.

Click to edit Master text styles – Second level Third level – Fourth level » Fifth level Give the student the problem Ask Could you do the problem without counting? Do you know what is? Can that help you find ? How could you use mental math to find the sum? What is the value of the digit _____? How could you decompose one of the addends to make the problem easier? What strategy did you use to solve the problem? How did it help you? Questions to Ask Your Child

Click to edit Master text styles – Second level Third level – Fourth level » Fifth level Real World Connections

Click to edit Master text styles – Second level Third level – Fourth level » Fifth level Real World Connections

Click to edit Master text styles – Second level Third level – Fourth level » Fifth level Real World Connections

Click to edit Master text styles – Second level Third level – Fourth level » Fifth level See You Next Episode! Keep in communication with your child’s teacher. elementarymath.mysdhc.org