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Addition and subtraction word problems 2

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Addition and subtraction word problems 2
Addition-and-subtraction-word-problems-within-20--level-2 256
Description
Exercise Name: Addition and subtraction word problems 2
Math Missions: Early math Math Mission
Types of Problems: 4

The first instance of Addition and subtraction word problems 2 used to appear under the Early math Math Mission. This exercise uses various geometric models to increase understanding of addition and subtraction.

Types of Problems

There are four types of problems in this exercise:

  1. Block visual with two blanks: This problems asks the student to answer two questions using an accompanying block diagram.
    Aswp2-1

    Block visual with two blanks

  2. Block visual with one blank in equation: This problem asks the student to use a block model and fill in one blank in an equation.
    Aswp2-2

    Block visual with one blank in equation

  3. Circle model with one answer: This problem asks the student to use the circle sum model to fill in a single answer.
    Aswp2-3

    Circle model with one answer

  4. Find answer and select equations: This problem has an arithmetic question that the student is to solve. After solving, they are to select all equations that could have been used to solve the given problem.
    Aswp2-4

    Find answer and select equations

Strategies

This exercise is fairly simple to attain accuracy badges and speed badges. It is necessary to read carefully however.

  1. In problem type one, the answer is the same number to both blanks because the problem is trying to encourage connections between different forms of answers.
  2. In problem type four, there is always two correct options that need to be selected.
  3. In problem type four, research indicates the necessary operation is always subtraction.
  4. In problem type four, the incorrect answer choice among the three options has a number that is different from all other options (it is the sum situation instead of the difference).

Real-life Applications

  1. Addition can be used for adding objects, like adding money totals.
  2. Subtracting can be used by businesses to see how much money they make minus the money they spent for profit.

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