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幼苗
共回答了22个问题采纳率:90.9% 举报
(1)-6+10-3+|-9|
=-6+10-3+9
=-9+19
=10;
(2)(-5.3)+(-3.2)-(-2.5)-|-5.7|
=-5.3-3.2+2.5-5.7
=-14.2+2.5
=-11.7;
(3)−23÷
4
9×(−
2
3)2+(−0.8)−5×(−
1
22)
=-8×
9
4]×[4/9]-0.8-5×(-[1/4])
=-8-0.8+1.25
=-7.55;
(4)−14−[2−(1−
1
3×0.5)]×(32−(−2)2]
=-1-[2-(1-[1/6]]×[9-4]
=-1-[2-[5/6]]×5
=-1-[7/6]×5
=-1-5[5/6]
=-6[5/6];
(5)(5ab+3a2)+(-2b2-4ba)
=5ab+3a2-2b2-4ba
=ab+3a2-2b2;
(6)[1/2a−3(2a−
2
3b2)+(−
3
2a+b2)
=
1
2]a-6a+2b2-[3/2]a+b2
=-7a+3b2.
1年前
2