懂数学的进来(负数乘法)

来源:百度知道 编辑:UC知道 时间:2024/04/28 05:47:54
要列出步骤
1.(-2)*(-8)*(-125)
2. 0.25*(-3.1)*(-8)
3. -4*(-5)*0.25
4. 100*(-3)*(-5)*0.01
5. 2.25*(-2.3)*3/25
6. -2.1*6.5*(-3/7)
列出步骤!!!!!

1.(-2)*(-8)*(-125)
= 16 * (-125) = -2000

2. 0.25*(-3.1)*(-8)
= 0.25 * 24.8 = 6.2

3. -4*(-5)*0.25
= 20 * 0.25 = 5

4. 100*(-3)*(-5)*0.01
= (-300) * (-0.05) = 15

5. 2.25*(-2.3)*3/25
= -5.175 * 3/25 = -15.525/25 = -0.621

6. -2.1*6.5*(-3/7)
= -13.65 * (-3/7) = 40.95/7 = 5.85

1.(-2)*(-8)*(-125)=-2000
2. 0.25*(-3.1)*(-8)= 6.2
3. -4*(-5)*0.25 =5
4. 100*(-3)*(-5)*0.01 =15
5. 2.25*(-2.3)*3/25 =-62.1
6. -2.1*6.5*(-3/7)=58.5

1.=-2*8*125=-2000
2.=0.25*8*3.1=6.2
3.=4*5*0.25=5
4.=100*0.01*3*5=15
5.=-2.25*3/25*2.3=-0.27*2.3=-0.621
6.=-2.1/7*6.5*3=-0.9*6.5=-5.85

(1)-2000
(2)6.2
(3)0.5
(4)15
(5)0.621
(6)5.85

你按负负得正,正负得负算啊