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0

thừa ô nào

(2,4+3,8)x1,2=7,44

(6,5+2,7)x0,8=1,7712

Học tốt nha!

28 tháng 11 2019
abc(a+b) x ca x c + b x c
2,43,81,27.447.44
6,52,70,87.367.36
                                                           250.9+150.15= 401.05301.9401.15521.3421.6399.7đáp án nào...
Đọc tiếp
                                                           250.9+150.15=
 401.05301.9
401.15521.3
421.6399.7

đáp án nào đúng

                                                                                                                                                                                                                                                                                 
                                                                                                                                                                                                                                                                                                                                             
                                                                                                                                                                                                                                                                                                                                             

 

5
22 tháng 2 2017

401.05

22 tháng 2 2017

đáp án là 451,4

vậy chẳng có đáp án nào đúng cả
 

2 tháng 8 2016

Theo mình thấy lớp 5 đâu có bài này đâu bạn

2 tháng 8 2016

Ta có: 16+x+12 =28 + x

và 8 + x + y = 16 + x + 28

=> 8+x+y=28+x

=> 8+y=28

=> y=20

Ta còn có y+10+12=28+x

=>42=28+x

=>x=14

23 tháng 5 2020

Hình 1:   Thể tích là: 5 x 4 x 3 = 60 (cm3)

Hình 2 :  Thể tích là: 1,5 x 1,2 x 0,6 = 1,08 (dm3)

Hình 3 :  Thể tích là: 3/4 x 2/3 x 1/2 = 1/4 (m3)

9 tháng 5 2020
Hình lập phương Hình AHình BHình C
Độ dài cạnh 8cm1,2dm1/2m
Diện tích một mặt 64cm 1,44dm 1/4m 
Diện tích xung quanh 256cm 5,76dm 1m 
Diện tích toàn phần 384cm 8,64dm 3/2m 

Mn giải giúp e với  

S(km)                      261                         78
V(km/giờ)                       60                         39
T(giờ)                     4,35 giờ                       2 giờ

HOK TỐT

10 tháng 4 2020

S(km)

261 78
V(km/giờ)                        60                                           39
T(giờ)                    4,35 

                      2                       

CT: S : V=T

Chúc bạn học tốt !