Use the Additive Inverse Starter File to complete this page. Do not click "Run" yet.

1 In the table below, record your Noticings and Wonderings about what you see in the Definitions Window (left side) of the Additive Inverse Starter File.

Notice Wonder

2 Click "Run." At the top of the Interactions Area on the right side, a message appears that says, "7 TESTS PASSED, 4 TESTS FAILED." Summarize the remaining information that appears by filling in the blanks, below.

  • In the first examples block , all 5 tests .

  • In the second examples block the examples at line and failed.

  • In the third examples block , the test .

3 First, let’s explore examples-block-1. In your own words, describe why each of the tests in examples-block-1 passed.

4 Below, place a checkmark next to each of the examples that passed from examples-block-2.

(EXAMPLE (- 30 5) (+ 30 5))

(EXAMPLE (+ 11 -9) (- 11 9))

(EXAMPLE (- 5 30) (- 5 -30))

(EXAMPLE (+ 24 -4) (- 24 -4))

(EXAMPLE (- 60 55) (+ 60 -55))

5 Edit each of the failing examples on the left so that all examples pass when you click "Run". Be sure to change only the part of the example after the is! Describe one of the changes you had to make.

6 Let’s explore examples-block-3. Below line 26 (3: My Own Example Block), create a block of 5 passing examples of your own. Hit "Run" to see if your examples pass. If not, revise them until they do. If you encountered an error message along the way, describe it here:

These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, 1738598, 2031479, and 1501927). CCbadge Bootstrap by the Bootstrap Community is licensed under a Creative Commons 4.0 Unported License. This license does not grant permission to run training or professional development. Offering training or professional development with materials substantially derived from Bootstrap must be approved in writing by a Bootstrap Director. Permissions beyond the scope of this license, such as to run training, may be available by contacting contact@BootstrapWorld.org.