20道有理数简便运算

张任性 3个月前已收到2个回答举报

共回答了17个问题采纳率：99.7% 评论

以下是20道有理数简便运算题目：
(-8) + (-10) + (-6) + (22)
(-4.25) + (5.75) + (-7.5) + (-2.5)
(-3.75) + (5.5) + (-2.25) + (-11.5)
(-3.125) + (3.25) + (5.375) + (-7.25)
(0.37) + (-8.6) + (-9.3) + (14.03)
(-7.28) + (9.1) + (-0.91) + (-2.8)
(-0.098) + (0.78) + (-3.68) + (0.902)
(-4.4) + (0.44) + (3.6) + (-5.56)
(-6/5) + (4/3) + (-14/3) + (16/5)
(-47/8) + (-36/7) + (101/7) + (21/8)
(-2.48) + (3/4) + (4.92) + (-3/4)
(-81/16) + (25/8) + (87/16) + (-63/8)
(-0.68) + (9/10) + (2.32) + (-9/10)
(1/4) + (-5/6) + (-7/8) + (9/12)
(-678+1)/(789-1)/(789+2)/(8910-4)
999**2+1999
99*99-198
7+9-6-89+5-4-3+28+17+06-54-63-42-10
999*2+3333444+333334
计算：(-1)+(+2)+(-3)+(+4)+...+(-99)+(+100)。

6小时前

长途步行 1星

共回答了197个问题评论

1、48÷[(-2)^3-(-4)] =48÷(-8+4) =48÷(-4) =-12

2、(-1)^3×(-5)÷[(-3)^2+2×(-5)] =(-1)^3×(-5)÷(9-10) =(-1)×(-5)÷(-1) =-5 3、(-2/9)+(-7/9)-(-2) =-1+2 =1

4、4.6-(-3/4+1.6-4)-3/4 =4.6-(-3.15)-0.75 =7.75-0.75 =7

5、(1/2-3+5/6-7/12)÷(-1/36) =(-27/12)÷(-1/36) =81

6、[3/4+(-1/2)-(-7/8)]÷(-7/8) =(9/8)÷(-7/8) =-9/7

7、-3×(-1/3)^3-(1/3)^2÷(-2/3)^2 =(-3)×(-1/27)-(1/9)÷(4/9) =1/9-1/4 =-5/36

8、[-1/3×(-1/2)+(-1/9)÷2/3]÷(-2)^3 =(1/6-1/6)÷(-8) =0÷(-8) =0

9、[(-3)^2-2^2-(-5)^2]×(5/6÷4/9)×(-2)^4 =(9-4-25)×(15/8)×16 =(-20)×(15/8)×16 =-600 10、4又1/2×[-3^2×(-1/3)^2-0.8]÷(-5又1/4) =(9/2)×[-9×(1/9)-0.8]÷(-21/4) =(9/2)×(-1.8)÷(-21/4) =(-81/10)÷(-21/4) =54/35

11、2×92.35^2+83.96^3 =2×8528.5225+7049.2816 =17057.045+7049.2816 =24106.3266 12、[2/3÷(-4)-1/4×(-0.4)]÷(1/3)^2-(-2) =(-1/6+0.1)÷(1/9)+2 =(-1/15)÷(1/9)+2 =(-3/5)+2 =1.4

13、300÷125÷8

=300÷(125×8)

=300÷1000

=0.3

14、396-96-172-28

=(396-96)-(172+28)

= 300-200

= 100

15、125*24

= 125*8*3

= 1000*3

= 3000