5 + 5 + 5 + ... + 5 +5(20 chữ số 5)
= 5 x 20
= 100
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Các câu hỏi tương tự
5+5+5+5+5+5+5+5+.................+5+5
tính tổng dãy trên biết dãy trên có 153467342 số 5
A=100-99+98-97+...+4-3+2
B=100-5-5-5-...-5[có 20 số 5]
So sánh A và B,biết:
A=2×2×2×2×...×2(50 số 2)
B=5×5×5×...×5(20 số 5)
4 5. 4. 6.
--- + --- --- + ---
15 6. 5. 7
3. 4. 2. 5
--- + --- --- + ---
5. 20. 5. 12
4 5. 4. 6.
--- + --- --- + ---
15 6. 5. 7
3. 4. 2. 5
--- + --- --- + ---
5. 20. 5. 12
4 5. 4. 6.
--- + --- --- + ---
15 6. 5. 7
3. 4. 2. 5
--- + --- --- + ---
5. 20. 5. 12
4 5. 4. 6.
--- + --- --- + ---
15 6. 5. 7
3. 4. 2. 5
--- + --- --- + ---
5. 20. 5. 12
4 5. 4. 6.
--- + --- --- + ---
15 6. 5. 7
3. 4. 2. 5
--- + --- --- + ---
5. 20. 5. 12
4 5. 4. 6.
--- + --- --- + ---
15 6. 5...
Đọc tiếp
4 5. 4. 6.
--- + --- --- + ---
15 6. 5. 7
3. 4. 2. 5
--- + --- --- + ---
5. 20. 5. 12
4 5. 4. 6.
--- + --- --- + ---
15 6. 5. 7
3. 4. 2. 5
--- + --- --- + ---
5. 20. 5. 12
4 5. 4. 6.
--- + --- --- + ---
15 6. 5. 7
3. 4. 2. 5
--- + --- --- + ---
5. 20. 5. 12
4 5. 4. 6.
--- + --- --- + ---
15 6. 5. 7
3. 4. 2. 5
--- + --- --- + ---
5. 20. 5. 12
4 5. 4. 6.
--- + --- --- + ---
15 6. 5. 7
3. 4. 2. 5
--- + --- --- + ---
5. 20. 5. 12
4 5. 4. 6.
--- + --- --- + ---
15 6. 5. 7
3. 4. 2. 5
--- + --- --- + ---
5. 20. 5. 12
4 5. 4. 6.
--- + --- --- + ---
15 6. 5. 7
3. 4. 2. 5
--- + --- --- + ---
5. 20. 5. 12
Tính giá trị biểu thức:
A = 100 - 99 + 98 -97 +...+ 4 - 3 + 2
B = 100 - 5 - 5 - 5 -...- 5 ( có 20 số 5)
tính giá trị biểu thức
A bằng 100-99+98-97+.....4-3+2
B bằng 100-5-5-5...-5 có 20 số 5
tại sao 5+5+5=540?
biết rằng thực chất đây là phép trừ và phải di chuyển một nét
1)điền dấu phép tính vào chỗ chấm để có kết quả đúng:
5...5...5...5...5...5...5 =150
5...5...5...5...5...5...5 =130
5...5...5...5...5...5...5 =55
tính giá trị của biểu thức
a) A = 100 - 99 + 98 - 97 + ... + 4 - 3 + 2
b) B = 100 - 5 - 5 - 5 - ... - 5 ( có 20 số 5 )