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帮我算下这4道计算题.(1)(-3)x(+12)(2)(-2/5)x(-5/2)(3)(-8)x(-25)x(+2)(4)1/3x(-1/3)x1/8x0x(-1/8)
题目详情
帮我算下这4道计算题.
(1)(-3)x(+12) (2)(-2/5)x(-5/2) (3)(-8)x(-25)x(+2) (4)1/3x(-1/3)x1/8x0x(-1/8)
(1)(-3)x(+12) (2)(-2/5)x(-5/2) (3)(-8)x(-25)x(+2) (4)1/3x(-1/3)x1/8x0x(-1/8)
▼优质解答
答案和解析
(1)(-3)x(+12)
=-3×12
=-36
(2)(-2/5)x(-5/2)
=2/5×5/2
=1
(3)(-8)x(-25)x(+2)
=8×25×2
=200×2
=400
(4)1/3x(-1/3)x1/8x0x(-1/8)
=0
=-3×12
=-36
(2)(-2/5)x(-5/2)
=2/5×5/2
=1
(3)(-8)x(-25)x(+2)
=8×25×2
=200×2
=400
(4)1/3x(-1/3)x1/8x0x(-1/8)
=0
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