Give two activities, each requiring different ability levels of the learners, to help them understand the concept of’negative number’. Justify your choice of activities, also explaining how the second activity requires a higher ability level of the learner than the first activity.

Activity 1

“I climbed up three meters into the tree, but then I decided I’d rather dig a hole to China. I went down a total of five meters from my lofty perch. How deep was my hole?”

Written as a math equation, that story looks like this: (+3) + (-5) = -2.

Activity 2

“Dad thought he could dig a better hole than that. He dug down one meter, and then he dug down two more meters, and then he dug three more after that! How deep did he go?”

That would be: (-1) + (-2) + (-3) = -6.

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