Đáp án:
x = 0 và 1
Giải thích các bước giải:
3/4 + 4/5 = 15/20 + 16/20 = 31/20
Vì 31/20 = 155/100 = 1,55
Mà x ∈ N ( N là số tự nhiên lên lớp 6 sẽ được học ) ; x < 1,55
=> x = 0 và 1
Vậy x = 0 và 1
Ta có :
$\dfrac{3}{4}$ + $\dfrac{4}{5}$ = $\dfrac{15}{20}$ + $\dfrac{16}{20}$ = $\dfrac{31}{20}$
Vậy ta có số tự nhiên 1 hoặc 0 < $\dfrac{31}{20}$
Vì nó đã qua phân số $\dfrac{20}{20}$ .
bạn đã có đức tính giản dị chưa ? vì sao ?
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