(1)14*(-1+5/7)(2)(-100)*(3/10-1/2+1/5-0.1)(3)9又18/19*(-5)
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(1)14*(-1+5/7)(2)(-100)*(3/10-1/2+1/5-0.1)(3)9又18/19*(-5)
(1)14*(-1+5/7)
(2)(-100)*(3/10-1/2+1/5-0.1)(3)9又18/19*(-5)
(1)14*(-1+5/7)(2)(-100)*(3/10-1/2+1/5-0.1)(3)9又18/19*(-5)
结果如下:
1.-4
2.10
3.4又18/19
(1)-4
(2)10
(3)-945/19
你这*号代表什么
1;14X(-2/7)=-4
2:-100X(0.3-0.5+0.2-0.1)=-100X(-0.1)=10
3: (10-1/19)X (-5)=-50+5/19=-49又14/19
结果如下:
1.-4
2.10
3.4又18/19
(1)14*(-2/7)=-4
(2)(-100)*0.1=10
(3)-945/19
1、原式=14×(﹣1)+14×5/7=﹣14+10=﹣4
2、原式=﹣100×3/10-﹙﹣100﹚×1/2+﹙﹣100﹚×1/5-﹙﹣100﹚×0.1=﹣30+50-20+10=10
3、原式=189/19×﹙﹣5﹚=﹣945/19
(1/2-1/3)+(1/4-1/5)+(1/7-1/10)+(1/14-1/15)+(1/28-1/30)要求简便运算.
(1)1+1/2+1/3+1/4+1/5+1/6+1/7+1/14+1/28
(1)14*(-1+5/7)(2)(-100)*(3/10-1/2+1/5-0.1)(3)9又18/19*(-5)
找规律,1/2,2又1/2,5,7,14()() 找规律填空
1, 2, 3, 6, 7, 14, ( )
1, 2, 3, 6, 7, 14, ( )
1、|(11/12)-(12/13)|+|(12/13)-(13/14)|+|(13/14)-(14/15)|+|(14/15)-(15/16)|2、0.0125*(16/5)-(1/7)*(-87.5)/(15/16)*(16/15)+(-2)²-43、(1/2)+1+(1/2)=2,(1/3)+(2/3)+1+(2/3)
1、16,4,1,1/4,(),()2、1/5,0.4,3/5,0.8,(),()3、7,5,14,4,21,3,(),()
1/9{7【1/5(x+4)+1】-5}=1 (4x-7)/5-(5x-4)/2=(14-x)/4
1/9{7【1/5(x+4)+1】-5}=1 (4x-7)/5-(5x-4)/2=(14-x)/4
(1/3-5/21+3/14-2/7)/(-1/42)
-(1/3-5/21+3/14-2/7)/(-1/42)
12*(5/6-1/14)-1/7
(1) 3/7+7÷1/9-2/5(2)5/14÷4/21×0.64
数学计算(要求过程写清)(1)-2²-(1-1/5×0.2)÷(-2)².(2)(1/3-5/7-2/5)×(-105)+2又13/14×(-7).
数字推理题 ( ),17/14,1,5/7,2/5,1/4
(1/2-1/4)÷(1-3/4*4/5)怎么做?还有1-(5/7+3/14÷3/4)*2/7
1,42 2,21 3,14 4,7 找规律(1,42)(2,21 )(3,14) (4,)(5,)找规律