(+14)+(-4)+(-2)+(+26)+(-3)=?
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(+14)+(-4)+(-2)+(+26)+(-3)=?
(+14)+(-4)+(-2)+(+26)+(-3)=?
(+14)+(-4)+(-2)+(+26)+(-3)=?
等于14减4减2加26减3
等于31
14-4-2+29-3
收起
原式=14-4-2+26-3=14+26-4-2-3=40-9=31
先去括号,看括号前面是+还是-。正正得正,负负得负,正负得负。+(-14)就是-14,以此类推。故得14-4-2+26-3=31
……
(14+26)+(-4-2-3)=30-9=21
14+(-4)-2-(-26)-3
(+14)+(-4)+(-2)+(+26)+(-3)
14+(-4)-2-(-26)-3怎么做
(+14)+(-4)+(-2)+(-26)+(-3)怎么做?要计算!
(+14)+(-4)+(-2)+(+26)+(-3的全过程以及答案)
(+14)+(-4)+(-2)+(+26)+(-3)=?
+(26)+2-14+{(-16+(+18)]=?
+(26)+2-14+{(-16+(+18)]=?
+(26)+2-14+{(-16+(+18)]=?
14+(-4)+(-2)+26+(-3)=?(-83)+26+(-41)+15=?
找规律(三题)17,2,14,2,11,2,( ),( ).2,7,15,26,( ),( ).19,4,18,3,17,( ),16,( )
(+14)+(-4)+(-2)+(+26)+(-3)= (-83)+(+26)+(-41)+(+15)=(-1.8)+(0.7)+(-0.9)+1.3+(-0.2)=4分之一+(-3又3分之1)+(+4又4分之3)+(-6又3分之2)=2-(-3又2分之1)={(-4)-(+7)}-
2 2 4 8 14 26 48 88(后一组数字?)
1、(+26)+(-14)+(-16)+(+8).2、(-5.3)+(-3.2)-(-2.5)-(+4.8).3、(-5又4/3)-(-3又3/2)-(-2又3/2)-(+2.5).
按规律找数:2,4,8,14,26,48,88,),298.
找规律 7 4 5 22 14 26 (1) 6 14 9 12 12 ( ) (2) 10 21 9 16 8 ( )
1.(-83)+(+26)+(-41)+(+15),2.(+14)+(-4)+(-2)+(+26)+(-3)3.(-9.6)+1.5+(-0.4)+(-0.3)+8.5
应知应会 晕 谁来救救我1、(+2)+(-11)2、(-3.4)+4.3 3、(-4.1)+1.9 4、(+14)+(-4)+(-2)+(+26)+(-3) 5、(-14)-(+15) 6、[(-4)-(+7)]-(-5) 7、(-6)*(-7) 8、-2*(-3)*(-4) 9、(-3/4)*