\(\dfrac{12}{5}+\dfrac{4}{5}=\dfrac{12+4}{5}=\dfrac{16}{5}\)
\(\dfrac{12}{5}+\dfrac{4}{5}=\dfrac{12+4}{5}=\dfrac{16}{5}\)
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. 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 bằng cách thuận tiện nhất theo mẫu:
Mẫu: 12 × 4 × 5 = 12 × (4 × 5)
= 12 × 20
a) 8 × 5 × 9
b) 6 × 7 × 5
c) 6 × 4 × 25
\(1/4*5/12+5/12*4/5 \) tính bằng hai cách
quy đồng mẫu số các phân số 1/2 ; 3/4 và 4/12 được:
A: 5/12;9/12 và 4/12 B:5/12;8/12 và 4/12 C:5/12;6/12 và 4/12 D:6/12;9/12 và 4/12
điền Đ hay S
a) 3/4+5/12 =7/6
b) 6/11 nhân 22/9 =2/3
c) 5/12 : 3/4= 5/9
d) 5/2 - 4/5 nhân 3/8= 5/9
2/5+2/3+3/4
2/6+3/12
5/6+1/3
1/3+5/12+5/6
5/8+4/7
1/5+5/35
5/8+3/4
1/6+1/3+1/12
1/6+5/24+2/3
7/3+8/7
2/5+1/6
1/7+1/4+6/7+3/4
giúp với
và ai giải được gọi cụ
làm 2 cách
1/4 x 5/12 x 5/12 x 4/5
so sánh giá trị của hai biểu thức (4-12/5):(3-9/5) và 4:12/5-3:9/5
5/12 +5/6 -3/4
1 - ( 1/5 +1/2 )
3/5 + 6/4 + 5/2
7/8 * 3+ 5/12
8/9 - 2/6 + 5/12=
5/12 + 3/4 + 1/3=
1/12 + 5/6 + 3/8=
