有理数的加法与减法:

问题描述:

有理数的加法与减法:
a+b=a+( )
(-2)-(-5)=______
0-(-4)=_____
(-6)-3=______
1-(+37)=______
温度3℃比-7℃高______;温度-8℃比-2℃低______.
列式计算:
(-1.7)-(-2.5)
=
=
2/3-(-1/2)
=
=
[(-5)-(-8)]-(-4)
=
=
3-[(-3)-10]
=
=
填空:
-8-4=( ) -20-(-12)=( ) -3/2-1/2=(___) |-9|-5=( )
(-3)-______=-1 _____-22=-14
海拔-200m比-300m高_______.从海拔250m下降到-100m下降了_____.
比-5小-7的数是_____,比0小-3的数是_______.
计算:
16-23 (-15)-(-27) 2.6-(-3.5)

b,3,4,-3,36,10度,-6度,-1.7+2.5=0.8,1又6分之1,7,10,-4,-8,
-2,4,-2,9,100m,350,-13,-3,-7,12,6,1口算的有错的请原谅!