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22 tháng 11 2018

đáp Án là 91

22 tháng 11 2018

đề sai rồi dãy số này ko có quy luật làm j mak chấm chấm được

22 tháng 11 2018

Có số số hạng là : (25-1):4+1=7 ( số hạng )

Tổng là : ( 25 + 1 ) x 7 : 2 = 91

hình như sai đề rồi . vì những số đầu cách đều 4 còn từ 17 đến 25 là cách đều 8.

22 tháng 11 2018

4 lần tuổi Dương là:

35-3=32(tuổi)

Tuổi Dương là:

32:4=8(tuổi)

5 lần tuổi Dương là:

8 x 5=40(tuổi)

Tuổi bố Dương là:

40-2=38(tuổi)

Vậy Dương 8 tuổi và bố Dương 38 tuổi

tuổi  Dương hiên nay là: (35-3):4=8 (tuổi)

tuổi bố Dương hiện nay là : 8x5-2 = 38 ( tuổi)

Đáp số 8; 38 tuổi

22 tháng 11 2018

9+9+9+9+9+9+9=63

22 tháng 11 2018

9+9+9+9+9+9+9=9*7=63

22 tháng 11 2018

số dầu thùng thứ 2 còn là:

15-10=5

số dầu của thùng thứ nhất là 

15+10=25

ta có ; 25 :5 = 5 vậy thùng thứ nhất gấp 5 lần thùng thứ 2

22 tháng 11 2018

62+27x38=62+1026
                =1088

= 1088

hok tốt

22 tháng 11 2018

Có : 32kg

Đã dùng hết : 1/8 số gạo

Còn lại :...kg?

22 tháng 11 2018

tóm tắt:
số gạo : 32kg
đã dùng: 1/8 số gạo
số gạo còn lại?

...
Đọc tiếp

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có báo niệu chữ v va x

5
22 tháng 11 2018

có 1 chữ v và 1 chữ x

Trả lời:

Có 1 chữ x và 1 chữ v

Hok tốt~~

22 tháng 11 2018

350 - x : 4 = 197

x: 4 = 153

x = 612

151 + x :7 = 610

x:7 = 459 

x = 3213

22 tháng 11 2018

a/ 350- x:4=197                                                                           b/151+x:7=610

          x:4=350-197                                                                                 x:7=610-151

           x:4=153                                                                                       x:7=459

          x=153 x 4                                                                                      x=459x7=3213

          x=612