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2022-07-29 15:43:37
2022-07-29 15:35:55
giải
x.(28-17-1)=250
x.10=250
x=250:10
x=25
vậy x=25
nhớ chọn cho mik nhé
2022-07-29 15:32:38
2022-07-29 15:31:31
Đáp án:
Thiếu 1000
Giải thích các bước giải:
Với Số tiền vừa đủ.
Sách tắng 800₫ nên 5 quyển sẽ là tăng 4000₫(1)
Cây viết giảm 1000₫ nên 3 cây là 3000(2)
(1)&(2)=> thiếu 1000₫
2022-07-29 15:29:39
2022-07-28 21:58:32
nửa chu vi hcn là 80:2=40cm
hiệu của cd và cr là 5+5=10cm
cd là (40-10):2=15cm
cr là 15-10=5cm
2022-07-28 21:56:54
ta thấy 15/60 khi rút gọn là =1/4
2022-07-28 21:48:46
2022-07-28 21:47:59
A
2022-07-28 21:47:06