a. 21 : (-7) + 17 = ... b. -42 : (-6) + (-9) = ...

Name: a. 21 : (-7) + 17 = ... b. -42 : (-6) + (-9) = ...
Uploaded: 2024-04-06T19:09:39.000Z
Duration: PT2M37.8393S
Description: a. 21 : (-7) + 17 = ... b. -42 : (-6) + (-9) = ...