Hello, 2nd Grade Parents!
Addition and Subtraction strategies play a huge role in 2nd grade. Number Talks would be a wonderful thing to do with your child while at home. This will help with mental math strategies, fact fluency, and numeracy – all skills that will help them be successful mathematicians.
Number Talks

Here is an example of Number Talk and the many ways your child may go about answering this mentally.
2.4(B) Add up to four two-digit numbers and subtract two-digit numbers using mental strategies and algorithms based on knowledge of place value and properties of operations;
Four two digit numbers – Second Grade students add a string of two-digit numbers (up to four numbers) by applying place value strategies and properties of operations.
Example: 43 + 34 + 57 + 24 = __

Example:
2.4(C) Solve one-step and multistep word problems involving addition and subtraction within 1,000 using a variety of strategies based on place value, including algorithms;
Within 1,000, using a variety of strategies
Algorithms-a process for solving a problem
Second Grade students extend their work with addition and subtraction word problems in two major ways. First, they represent and solve word problems within 100, building upon their previous work to 20. In addition, they represent and solve one and two-step word problems of all three types (Result Unknown, Change Unknown, Start Unknown).
One-step word problems use one operation. Two-step word problems use two operations which may include the same operation or opposite operations.
As second grade students solve one- and two-step problems they use manipulatives such as snap cubes, place value materials (groupable and pre-grouped), ten frames, etc.; create drawings of manipulatives to show their thinking; or use number lines to solve and describe their strategies. They then relate their drawings and materials to equations.
Addition Example without Regrouping Using Picture Form, Expanded Form and Number Line

Addition Example with Regrouping Using Picture Form
Sample Multi-Step Problems
Ben wanted to count how many writing tools he had at home. He counted 20 pens and 30 pencils. He gave 15 of his writing tools to his little sister. How many writing tools does Ben have left?
John had 54 pictures in his photo album. He took 15 more pictures and added them to his photo album. He decided that he didn’t like 19 of the pictures, so he took them out. How many pictures are in John’s photo album now?
Sebastian had 82 blue cubes and 95 red cubes. If Rylen gave him 76 green cubes, how many cubes does Sebastian have in all?
Vivian wrote a book with 127 words. She added 42 words during the writer’s workshop. She decided one sentence didn’t make sense, so she had to erase 13 words. How many words are in Vivian’s book now?
Holden had 214 Pokemon cards and Jude had 158 Pokemon cards. They brought them out to recess to play with them. While they were outside, the wind blew 34 of their Pokemon cards away. How many Pokemon cards do they have all together?
Michelle went shopping and had $300 to spend. She bought a shirt for $110 and shoes for $62. How much money does Michelle still have left to spend?
Maria had friends over for a water balloon fight. Her mom filled up 100 water balloons before her friends got there. They used 75 of the water balloons, then her mom brought them 34 more water balloons to use. How many water balloons does Maria and her friends have now?
Lauren’s mom told her that she could play in her pool for 30 minutes. She swam laps for 8 minutes, dove off the diving board for 12 minutes, and did headstands in the pool for 3 minutes. How much time does Lauren have left to be in the pool?
Craig has a $50 bill. He buys a squirt gun for $12, Lego’s for $25, and a stuffed animal for $7. How much money does Craig have left?
Tricia’s mother let her play outside for 45 minutes. When she went outside, she played with her dog for 15 minutes. Then she rode her bike for 22 minutes. She spent the rest of the time catching bugs. How many minutes did Tricia spend catching bugs?
Sebastian had 345 blue Legos and 28 red Legos in his collection. He lost some of them at a friend’s house. Now he has 456 total Legos. How many Legos did he lose at his friend’s house?
Jimmy and Kelly ran a snack stand in their front yard. They sold cookies for 5¢ and cupcakes for 10¢. They sold 3 cookies and 1 cupcake. How much money did they make altogether?





























































