Opposite numbers, modulus and comparing numbers
Answers are for parents and teachers.
1
Write the opposites of −15 and 8.
15 and −8
2
Compute |−20| − |12|.
8
3
Write −3, −9, 4, 0, −1 in decreasing order.
4, 0, −1, −3, −9
4
Yesterday it was −2 °C and today −9 °C. By how many degrees did it change? Did it warm or cool?
−7: it cooled by 7 degrees.
5
Write all integers whose modulus is less than 4.
−3, −2, −1, 0, 1, 2, 3