Giá trị của biểu thức 45 x m bằng bao nhiêu khi m = 11?
A. 495
B. 459
C. 594
D. 549
K
Khách
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PT
1
CM
10 tháng 7 2018
Thay m = 11 vào biểu thức 45 × m ta được: 45 × 11 = 495
Chọn A
CM
12 tháng 8 2018
Số lớn nhất trong các số 459 495; 459 549; 549 954 và 549 945 là 549 954.
Chọn C.
NT
10 tháng 1 2021
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CM
1 tháng 5 2017
a ) 5 4 9 − 9 7 12 − 4 5 9 = 5 4 9 + 4 5 9 − 9 7 12 = 10 − 9 7 12 = 5 12 .
b ) 8 1 3 + 7 , 8 + 5 2 3 − 1 , 8. = 8 1 3 + 5 2 3 + 7 , 8 − 1 , 8 = 14 + 6 = 20
9 tháng 10 2021
a) khi k=1000 thì giá trị của biểu thức là : ( 1000 - 10) x 5 = 990 x 5 = 4950
b) ta có: 9999 : 5= k- 10
1999,8 = k-10
k= 1989,8 - 10 =1979,8
đề bài hơi khó hiểu nên mik làm 2 cách:
a)khi k=1000 thì giá trị của biểu thức là : ( 1000 - 10) x 5x10 = 990 x 5x10 = 49500
b)
ta có: 9999 : 5 x10 = k- 10
19998 = k-10
k= 19898 - 10 =19798
học tốt ! :))
BT
15 tháng 9 2023
a) khi k=1000 thì giá trị của biểu thức là : ( 1000 - 10) x 5 = 990 x 5 = 4950
b) ta có: 9999 : 5= k- 10
1999,8 = k-10
k= 1989,8 - 10 =1979,8
đề bài hơi khó hiểu nên mik làm 2 cách:
a)khi k=1000 thì giá trị của biểu thức là : ( 1000 - 10) x 5x10 = 990 x 5x10 = 49500
b)
ta có: 9999 : 5 x10 = k- 10
19998 = k-10
k= 19898 - 10 =19798
17 tháng 10 2021
a) Khi k = 100 thì k - m × n =
100 - 10 × 5 = 100 - 50 = 50
b) Ta có :
k - 10 × 5 = 9999
k - 50 = 9999
k = 9999 + 50
k = 10049
Đáp án A