问数学题~~~急急急~!!!

来源:百度知道 编辑:UC知道 时间:2024/06/09 14:38:34
22/7*(22/7-22/3)*7/22÷22/21 42*(-2/3)+(-3/4)÷(-0.25)

6+(-1/5)-2-(-1.5) -66*4-(-2.5)÷(-0.1)

22/7*(22/7-22/3)*7/22÷22/21
=22/7*7/22*(22/7-22/3)÷22/21
=(22/7-22/3)÷22/21
=(22/7-22/3)*21/22
=22/7*21/22-22/3*21/22
=3-7
=-4

42*(-2/3)+(-3/4)÷(-0.25)
=-14*2+(-3/4)*(-4)
=-28+3
=-25

6+(-1/5)-2-(-1.5)
=6-0.2-2+1.5
=5.3

-66*4-(-2.5)÷(-0.1)
=-264-2.5*10
=-264-25
=-289

22/7*(22/7-22/3)*7/22÷22/21
=22/7*7/22 *(22/7-22/3)*21/22
=21/22*22(1/7-1/3)
=21*(-4/21)
=-4.

42*(-2/3)+(-3/4)÷(-0.25)
=-28 +3/4*4
=-28 +3
=-25.

6+(-1/5)-2-(-1.5)
= 4 +1.5-0.2
=5.3.

-66*4-(-2.5)÷(-0.1)
=-264-2.5*10
=-264-25
=-289.

-4
-25
5.3
-289