Answer:
1. 26-30 = -4
2. 3 × -4 = -12
3. -2 × -7 × -10 = -140
4. 2 × -5 × 0 = 0
5. associative (?)
6. commutative
7. -18 ÷ 2 = -9
8. -6 ÷ (-3) = 2
9. 15 ÷ -3 = -5
10. 0 ÷ 10 = 0
11. always positive
12. always negative
13. 11
14. 8 × 10 × 9 = 720
15. 16 × 10 + 2 = 162
rules in adding, subtracting, multiplying and dividing integers (simplified)
# addition
positive + positive = +
negative + negative = -
positive + negative (vice versa) = subtract and copy the sign of the higher number
# subtraction
always change the sign of the subtrahend and proceed to addition
# multiplication and division
positive ×/÷ positive = +
negative ×/÷ negative = +
positive ×/÷ negative = -
©iarchives #carryonlearning :: please study well, bub ! take care <3
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Answers & Comments
Answer:
1. 26-30 = -4
2. 3 × -4 = -12
3. -2 × -7 × -10 = -140
4. 2 × -5 × 0 = 0
5. associative (?)
6. commutative
7. -18 ÷ 2 = -9
8. -6 ÷ (-3) = 2
9. 15 ÷ -3 = -5
10. 0 ÷ 10 = 0
11. always positive
12. always negative
13. 11
14. 8 × 10 × 9 = 720
15. 16 × 10 + 2 = 162
rules in adding, subtracting, multiplying and dividing integers (simplified)
# addition
positive + positive = +
negative + negative = -
positive + negative (vice versa) = subtract and copy the sign of the higher number
# subtraction
always change the sign of the subtrahend and proceed to addition
# multiplication and division
positive ×/÷ positive = +
negative ×/÷ negative = +
positive ×/÷ negative = -
©iarchives #carryonlearning :: please study well, bub ! take care <3