关于相反数.关于opposite number.If |a|=4,|b|=3,a>b,find the value of (a+b)

关于相反数.关于opposite number.If |a|=4,|b|=3,a>b,find the value of (a+b)
关于相反数.
关于opposite number.If |a|=4,|b|=3,a>b,find the value of (a+b)

关于相反数.关于opposite number.If |a|=4,|b|=3,a>b,find the value of (a+b)
|a|=4,|b|=3,a>b
(1)a=4,b=3,满足a>b,则 a+b=4+3=7；
(2)a=-4,b=3,不满足a>b,则舍去；
(3)a=-4,b=-3,不满足a>b,则舍去；
(4)a=4,b=-3,满足a>b,则 a+b=4+(-3)=1

∵a>b
so a=4 b=3
or a=4 b=-3
a+b=7or1

|a|=4, |b|=3, a=4或-4, b=3或-3, 又a>b，所以 a=4,b=3或-3
a+b=7或1，

若a = 4,则b = 3或-3，均成立。
若a = -4，不成立。
故a+b = 1或7

1. We didn't want to get in trouble, _____ we parked in the lot around the corner.


A. so
B. but
C. because
D. although


The Correct Answer is 1

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1. We didn't want to get in trouble, _____ we parked in the lot around the corner.


A. so
B. but
C. because
D. although


The Correct Answer is 1
2. "Are you and Richard in the same apartment building?" "No, we _____."


A. isn't
B. weren't
C. are
D. aren't


The Correct Answer is 4
3. My brother is studying hard to be _____.


A. writer
B. write
C. a writer
D. writes


The Correct Answer is 3
4. If you _____ faster, we could have turned in the project before the deadline.


A. work
B. had worked
C. have worked
D. working

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