(637 . 527 - 189) : ( 526.637 + 448 )
=
=
=
=
=
=
637*527-189/526*637+448
(637 x 527-189) : (526 x 637 +448)
\(\dfrac{637\times527-189}{526\times637+448}\)
\(=\dfrac{637\times\left(526+1\right)-189}{526\times637+448}\)
\(=\dfrac{637\times526+637-189}{526\times637+448}\)
\(=\dfrac{637\times526+448}{526\times637+448}\)
\(=\dfrac{1}{1}\)
\(=1\)
\(\dfrac{\left(637\cdot527-189\right)}{\left(526\cdot637+448\right)}\)
\(=\dfrac{\left(637\cdot526+637-189\right)}{\left(526\cdot637+448\right)}\)
\(=\dfrac{637\cdot526+448}{637\cdot526+448}=1\)
Tính nhanh 637*527-189 gach gang duoi 526*637+448
526 x 637 + 448 phần 637 x 527 - 189
Giúp mik nha !!!!!
526 x 637 + 448 335510
---------------------------- = ------------------------ = 1
637 x 527 -189 335510
Hok tốt nhé
# EllyNguyen #
526 x 637 + 448 / 637 x 527 - 189
= 526 x 637 + 448 / 637 x ( 526 + 1 ) - 189
= 526 x 637 + 448 / 637 x 526 + 637 - 189
= 526 x 637 + 448 / 637 + 526 + 448
= 1
k mik nhé
tính nhanh : 637 nhân 527 - 189 / 526 nhân 637 + 448 (dấu / ngăn cách tử số và mẫu số)
\(\frac{637\times527-189}{526\times637+448}\)
\(=\frac{637\times526+527-189}{526\times637-189+637}\)
\(=\frac{1+527-189}{1-189+637}\)
\(=\frac{1-189+527}{1-189+637}\)
\(=\frac{527}{449}=\frac{339}{449}\)
~ Hok tốt ~
áp dụng tính chất nhân cộng, tính nhanh.
(637 x 527 - 189) : (526 x 637 + 448)
TÍNH NHANH
637 x 527 - 189
526 x 637 + 448
\(\frac{637\cdot526+637-189}{526\cdot637+448}\)=\(\frac{637\cdot526+448}{637\cdot526+448}\)=1
tính nhanh :
c) 637 x 527 - 189 / 526 x 637 + 448
d) 677 x 874 + 251 / 678 x 874 - 623
\(\frac{637\times527-189}{526\times637+448}\)
\(=\frac{637\times\left(526+1\right)-189}{526\times637+448}\)
\(=\frac{637\times526+637-189}{526\times637+448}\)
\(=\frac{637\times526+448}{526\times637+448}\)
\(=1\)
\(\frac{677\times874+251}{678\times874-623}\)
\(=\frac{677\times874+251}{\left(677+1\right)\times874-623}\)
\(=\frac{677\times874+251}{677\times874+874-623}\)
\(=\frac{677\times874+251}{677\times874+251}\)
\(=1\)
\(\frac{637\times527-189}{526\times637+448}\)
\(=\frac{526\times637+637-189}{526\times637+448}=\frac{526\times637+448}{526\times637+448}=1\)
tính nhanh :
c) 637 x 527 - 189 / 526 x 637 + 448
d) 677 x 874 + 251 / 678 x 874 - 623
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa