Answer: 5
2. It is known that |a-2 is 1 | | B+3 is1| C+5 is 2|=0 ① Find |a|+|(-b)|+|c| ② Compare the sizes of A, B, c B and C.
Answer: 37 2 A > b & gtc
3. Calculate |1-991|101-1||1068.
Answer: 0
4, ①a=-3, then -a=()②-a=-2, then a=()③|a|=4, then a=()④|a|=|-3|, then a= ()
Answer: 1 3 2 2 3 4 3
5. It is known that it is the largest negative integer of A, the inverse of B is itself, and C is larger than the smallest positive integer by 2, so the value of 3ab+2c is calculated.
Answer: 6
6. It is known that |a|=3, |b|=2, |a-b|=a-b find the values of a and b..
Answer: a=3 b=2 or a=3 b=-2.
7.|x+ 1|+|y-2|+|z+3|=0。 Find the value of |x|+|y|+|z|.
Answer: 6
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