Common Core State Standards:
Math.2.OA.1 or 2.OA.A.1
Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.
Common Core State Standards:
Math.2.MD.4 or 2.MD.A.4
Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit.
Common Core State Standards:
Math.2.MD.5 or 2.MD.B.5
Use addition and subtraction within 100 to solve word problems involving lengths that are given in the same units, e.g., by using drawings (such as drawings of rulers) and equations with a symbol for the unknown number to represent the problem.
Common Core State Standards:
Math.2.MD.6 or 2.MD.B.6
Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points corresponding to the numbers 0, 1, 2, ..., and represent whole-number sums and differences within 100 on a number line diagram.
2nd Grade Math - One-Step Problems Lesson
WORD PROBLEMS
Representing and solving word problems involves choosing the correct operation (like addition or subtraction), as well as knowing which values to use.
The table below shows some common types of word problems.
There were two birds on a fence. Three more birds flew to the fence. How many birds are on the fence now?
2 + 3 = ?
There were two birds on a fence. Some more birds flew to the fence. Then there were five birds. How many birds flew to the fence?
2 + ? = 5
There were some birds on a fence. Three more birds flew to the fence. Then there were five birds. How many birds were on the fence before?
? + 3 = 5
Maria had five crayons. She gave two crayons to a friend. How many crayons does Maria have now?
5 − 2 = ?
Maria had five crayons. She gave some crayons to a friend. Then she had three crayons. How many crayons did Maria give away?
5 − ? = 3
Maria had some crayons. She gave two crayons to a friend. Then she had three crayons. How many crayons did Maria have before?
? − 2 = 3
A bag has three blue marbles and two yellow marbles. How many marbles are in the bag?
3 + 2 = ?
A bag has five marbles. Three of the marbles are blue. The other marbles are yellow. How many yellow marbles are in the bag?
3 + ? = 5 , 5 − 3 = ?
Sam puts five toy cars into a red box and a blue box. How many cars could go in each box?
2nd Grade Math - One-Step Problems Lesson