1-2+3+4-5+6+7+8-9+ 10- 1 1- 12=0
② If |a|=8, |b|= 1, and c is the largest negative integer, then a+b+c= (). Write down all the answers.
a=8，-8； b= 1，- 1； c=- 1
a+b+c = 8+ 1- 1 = 8；
a+b+c = 8- 1- 1 = 6；
a+b+c =-8+ 1- 1 =-8；
a+b+c =-8- 1- 1 =- 10。
③ |π-3. 14|+3. 14-π=( 0 )。 |π-3. 14|+3. 14-π=π-3. 14+3. 14-π=0
(4) In the mid-term exam, the test scores of the members of the "Star Team" are as follows:
Sun Tao scored 98 points, Jerry Lee 100 points, Zhang Na scored 96 points, Zhao Yi scored 92 points and Wu Hao scored 93 points.
1.(98+100+96+92+93) ÷ 5 = 479 ÷ 5 = 95.8 (point)
2.95+(3+5+1-3-2) ÷ 5 = 95+4 ÷ 5 = 95.8 (point)