几道计算题!在线等!详细!
1.(1)(-1.5)-(-10.5)+(-2)²(2)(-0.1)÷1/2×(-100)(3)-8-[-7+(1-2/3×0.6)÷(-3)](4)(-3)&...
1.(1)(-1.5)-(-10.5)+(-2)²
(2)(-0.1)÷1/2×(-100)
(3) -8-[-7+(1-2/3×0.6)÷(-3)]
(4) (-3)²-(1又1/2)³×2/9-6÷(-24/5)
2. 化简:
(1)(m+2n)-(2m-n)
(2) 2×(-4a²+8a³-2a+1)-3(-a²+5a³-3a-1)
3. 先化简再求值:
1/2a-2(a-1/3b²)+(-3/2ab+1/3b²),其中a=1,b=-3. 展开
(2)(-0.1)÷1/2×(-100)
(3) -8-[-7+(1-2/3×0.6)÷(-3)]
(4) (-3)²-(1又1/2)³×2/9-6÷(-24/5)
2. 化简:
(1)(m+2n)-(2m-n)
(2) 2×(-4a²+8a³-2a+1)-3(-a²+5a³-3a-1)
3. 先化简再求值:
1/2a-2(a-1/3b²)+(-3/2ab+1/3b²),其中a=1,b=-3. 展开
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