Tinh
a , 1 5 + 4 11 + 4 5 + 7 11 b , 5 6 + ( 5 9 - 1 4 )
Những câu hỏi liên quan
Tinh
A)1×3+2×5+3×7+4×9+...+50×101
b)1×5+2×7+3×9+4×11+...+50×103
a 1/5 + 4/11 +1/5 + 7/11 b. 3/5 x 4/7 + 2/5 x 4/7
a) \(\dfrac{1}{5}+\dfrac{4}{11}+\dfrac{1}{5}+\dfrac{7}{11}=\dfrac{1}{5}+\left(\dfrac{4}{11}+\dfrac{7}{11}\right)=\dfrac{1}{5}+1=\dfrac{1}{5}+\dfrac{5}{5}=\dfrac{6}{5}\)
b) \(\dfrac{3}{5}\times\dfrac{4}{7}+\dfrac{2}{5}\times\dfrac{4}{7}=\left(\dfrac{3}{5}+\dfrac{2}{5}\right)\times\dfrac{4}{7}=1\times\dfrac{4}{7}=\dfrac{4}{7}\)
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2/5-2/9+2/11/7/5-7/9+7/11:1/3-1/4+1/5/7/6-7/8+7/10:tinh nhanh
tinh nhanh (viet ho minh luon cach lam nha)
a=1-3+5-7+9 -11+...+49-51
b=-1+4-5+8-9+12-...-53+56
c=1+3-5-7+9+11-...-397-399
d=1-2-3+4+5-6-7+...+97-98-99+100
tinh bang cach thuan tien nhat
a(6/11 + 5/11)*3/7
b.3/5 * 7/9 +3/5*2/9
c.(6/7 - 4/7) : 2/5
d.(8/15 : 2/11 + 7/15 : 2/11
TINH NHANH
2/3-1/4+5/11/5/12+1-7/11
Thuc hien phep tinh bang cach tinh nhanh :
a) 4/9 + 3/2 + 6/36.
b) 2/7 x 5/17 + 12/7 x 15/17.
c) 2,34 + 5,18 + 7,66.
d) 7/11 : 3/4 + 7/11 : 1/4.
GIUP MINH MINH DANG CAN GAP.
tinh gia ri bieu thuc sau
A= ( 6 : 3/5 - 1 và 1/6 . 6/7 ) : ( 4 và 1/5 . 10/11 + 5 và 2/11)
tinh gia tri bieu thuc ho mk roi mk k cho
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Tinh gia tri cua bieu thuc:
a, 4+11/8-5/6=
b, (1/2+4/7)-(3/7-3/10)=
\(4+\frac{11}{8}-\frac{5}{6}=\frac{96+33-20}{24}=\frac{109}{24}\)
\(\left(\frac{1}{2}+\frac{4}{7}\right)-\left(\frac{3}{7}-\frac{3}{10}\right)=\frac{1}{2}+\frac{4}{7}-\frac{3}{7}+\frac{3}{10}\)
\(\left(\frac{1}{2}+\frac{3}{10}\right)+\left(\frac{4}{7}-\frac{3}{7}\right)=\frac{4}{5}+\frac{1}{7}=\frac{28+5}{35}=\frac{33}{35}\)
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ban Chitanda Eru oi to bao nhung ma nhan voi bao nhieu ma ra duoc 96
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So sanh A va B
A=-1/2011-3/11^2-5/11^3-7/11^4
B=-1/2011-7/11^2-5/11^3-3/11^4