Answer:
11. 53 - 25 = 78
↓ Subtract the number
28 = 78
↓ The equality is false because the ___ left-hand and right-hand side is ___ different
False
12. (-6) - 123 = - 129
↓ Remove unnecessary parentheses
- 6 - 123 = - 129
↓ calculate the difference
- 129 = - 129
↓ the quality is true because both ___ sides are identical.
True
13. (-4) -(-9) = 5
↓ Remove unnecessary parentheses
- 4 - (-9) = 5
↓ When there is a - in front of an ___ expression in parentheses, change ___ the sign of each term in the
expression.
- 4 + 9 = 5
↓ Calculate the sum
5 = 5
↓ The quality is true because both ___ sides are identical
True
14. 6 - 15 = - 21
↓ Calculate the difference
- 9 = - 21
↓ The quality is false because the left- __ hand and right-hand side are different
False
15. 16 - (-20) = 4
↓ When there is a - in front of an ___ expression in parentheses, change ___ the sign of each term in the
___ expression
16 + 20 = 4
↓ Add the numbers
36 = 4
↓ The equality is false because the
__ left-hand and right-hand side are __ different
False
Step-by-step explanation:
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