677 * 874 + 251
678 * 874 - 623
Tính nhanh nhé
Ghi lời giải đầy đủ , ko thì đừng mơ đến tick
Tính nhanh
a)637x527-189 phần 526x637 + 448 b)677 x 874 +251 phần 678 x874- 623
Các bạn thông cảm nhé mình ko biết viết phân số trên máy tính , còn nữa bạn nào trả lời nhanh đúng đầy đủ mình sẽ tick 2 cái cho
a) 637 x 527 - \(\frac{189}{526}\)x 637 + 448
cai này ra số thập phân đấy
Bằng 335918,116
b) cái này cũng thế nốt
\(\frac{637\times527-189}{526\times637+448}=\frac{527-189}{526+448}\)
\(=\frac{338}{974}=\frac{169}{487}\)
b) \(\frac{677\times874+251}{678\times874-623}=\frac{677+251}{678-625}\)
\(=\frac{918}{55}\)
đúng thì ủng hộ
637x527-189
526x637+448
=637x(526+1)-189
526x637+448
=637x526+637-189
526x637+448
=637x526+448
526x637+448
=1(vì tử số =mẫu số)
Tính nhanh:
677 x 874 + 251
678 x 874 - 623
\(\frac{677\times874+251}{678\times874-623}\)\(=\frac{677\times874+251}{\left(677+1\right)\times874-623}\)\(=\frac{677\times874+251}{677\times874+1\times874-623}\)\(=\frac{677\times874+251}{677\times874+874-623}=\frac{677\times874+251}{677\times874+251}=1\)
\(\frac{677.874+251}{678.874-623}\)
\(=\frac{677.874+251}{\left(677+1\right).874-623}\)
\(=\frac{677.874+251}{677.874-1.874-623}\)
\(=\frac{677.874+251}{677.874+874-623}\)
\(=\frac{677.874+251}{677.874+251}\)
\(=1\)
Hok tốt
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
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tính nhanh :
c) 637 x 527 - 189 / 526 x 637 + 448
d) 677 x 874 + 251 / 678 x 874 - 623
c) 637 x 527 - 189=335510 / 526 x 637 + 448=335510
d) 677 x 874 + 251 =591949 / 678 x 874 - 623=591949
học tốt
c, 637x527-189/526x637+448=335918,116
d, 677x874+251/678x874-623=91398,5605
\(\frac{677\times874+251}{678\times874-623}\)
\(=\frac{677\times874+251}{677\times874+874-623}=\frac{677\times874+251}{677\times874+251}\)
\(=1\)
tính nhanh :
c) 637 x 527 - 189 / 526 x 637 + 448
d) 677 x 874 + 251 / 678 x 874 - 623
saaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaadaaaaaaaaaaaaaaaaaaaaaaaaaaaaaoaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
\(\frac{637x527-189}{526x637+448}\)
\(=\frac{527-189}{526+448}\)
\(=\frac{526-188}{526+448}\)
\(=\frac{188}{448}=\frac{47}{112}\)
A = 677 x 874 + 251 / 678 x 874 - 623
Tính :
(677*874+251) : (678*874-623)=1
Mình không biết đúng hay sai nữa.Thông cảm
Cho phép nhân ABCD x E = DCBA . Với ABCD là các chữ số khác nhau , Tìm ABCD
lời giải đầy đủ 2 tick , ko lời giải thì mơ
ABCD = 2178
E = 4
DCBA = 8712
2178 X 4 = 8712
lời giải đâu , lập luận thế nào ra 2178
Bài 2 tính nhanh a,15 x 2121/4343 + 15 x 222222/434343 b,399 x 45 + 55 x 399/1995 x 1996 - 1991 x 1995 c,1996 x 1995 - 996/1000 + 1996 x 1994 d,637 x 527 - 189/526 x 637 + 448 e,677 x 874 + 251/678 x 874 - 623 khẩn cấp huhuhu.......... aaaaaaaaaa
a, 15(21/43+22/43)=15.1=15
b, 399(45+55) / 1995(1996-1991)
=399.100 / 1995.5
=4