tinh nhanh
1000 - 47 x 72 - 47 x 28
3457 -27 x 48 - 48 x 73 + 6543
Bài 5*: Tính nhanh:
10000 - 47 x 72 - 47 x 28 3457 - 27 x 48 - 48 x 73 + 6543
=
1000 - 47 . 72 - 47 .28
= 47 . ( 1000 - 72 -28 )
= 47 .0
=0
3457 - 27 . 48 - 48 .73 + 6543
=3457 - 48 . (27 + 73 ) + 6543
= 3457 - 4800 + 6543
= 5200
bài 7:tính nhanh
a (145 x 99+145)-(143 x 102-143) b,54 x 47 - 47 x 53 - 20 -27
c, 10000 - 47 x 72 - 47 x 28 d, 3457 - 27 x 48 - 48 x 73 + 6543
a) \(\left(145\times99+145\right)-\left(143\times102-143\right)\)
\(=\left[145\times\left(99+1\right)\right]-\left[143\times\left(102-1\right)\right]\)
\(=\left(145\times100\right)-\left(143\times101\right)\)
\(=14500-14443\)
\(=57\)
b) \(54\times47-47\times53-20-27\)
\(=47\times\left(54-53\right)-20-27\)
\(=47-20-27\)
\(=0\)
c) \(10000-47\times72-47\times28\)
\(=10000-47\times\left(72+28\right)\)
\(=10000-47\times100\)
\(=10000-4700\)
\(=5300\)
d) \(3457-27\times48-48\times73+6543\)
\(=\left(3457+6543\right)-48\times\left(27+73\right)\)
\(=10000-48\times100\)
\(=10000-4800\)
\(=5200\)
10000 - 47 x 72 - 47 x 28
3457-27 x48 -48 x73 + 6543
10000-47x72-47x28
=10000-47x72-47x47-28
=47x(10000-72-28)
=47x0
=0
MIK CHỈ GIẢI DƯỢC PHẦM ĐẦU THUI
SORRY NHÉ
= 47 x (1000 - 72 - 28 )
= 47 x 0
= 0
1000 - 47 . 72 - 47 .28
= 47 . ( 1000 - 72 -28 )
= 47 .0
=0
3457 - 27 . 48 - 48 .73 + 6543
=3457 - 48 . (27 + 73 ) + 6543
= 3457 - 4800 + 6543
= 5200
3457 - 27 x 48 - 48 x 73 +6543
326 x 728 + 327 x 272
2008 x 867 + 2009 x 133
10000 - 47 x 72 - 47 x28
3457 - 27 x 48 - 48 x 73 + 6543
=3457 - 48 x ( 27 + 73) + 6543
=3457 - 48 x 100 + 6543
=(3457+ 6543) - 4800
=10000- 4800
=5200
Bài 3: Tính bằng cách thuận tiện
a) 10000 – 47 x 72 – 47 x 28
b) 3457 – 27 x 48 – 48 x 73 + 6543
c) (145 x 99 + 145 ) – ( 143 x 102 – 143 - 143 )
c)(145x99+145)-(143x102-143)
= 145x(99+1)-143x(101-1)
= 145x100-143x100
= (145-143)x100
= 2x100
= 200
Bài 5 : Tính nhanh
a, 10000 - 47 * 72 - 47 * 28
b, 3457 - 27 *48 - 48 * 73 + 6543
a) 10000 - 47 . 72 - 47 . 28
= 10000 - 47 ( 72 - 28 )
= 10000 - 47 . 44
= 10000 - 2068
= 7932
b) 3457 - 27 . 48 - 48 . 73 + 6543
= 3457 - 48 ( - 27 - 48 ) + 6543
= 3457 - 48 . ( - 75 ) + 6543
= 3457 - ( - 27 ) + 6543
= 3457 + 27 + 6543
= 10027
a, 10000-47×72-47×28
= 10000-47(72+28)
=10000-47×100
=10000-4700= 5300
Tính nhanh
3457 - 27 x 48 - 48 x 73 +6543
3457 - 27 x 48 - 48 x 73 + 6543
= (3457 + 6543) - (27 x 48 + 48 x 73)
= 10000 - 48 x (27 + 73)
= 10000 - 48 x 100
= 10000 - 4800
= 5200
Ủng hộ mk nha ^_-
kết quảlà 5200 nhé
=( 3457 + 6543 ) - (27 x 48 - 48 x 73)
=10000 - 48 x (27 + 73)
= 10000 - 48 x 100
=10000 - 4800
= 5200
3457 - 27 x 48 - 48 x 73 + 6543
tính nhanh giúp mình nhé
iiuiuuiuuuiuuuuiuuuuu
A = 3457 - 27\(\times\) 48 - 48 \(\times\) 73 + 6543
A =(3457 + 6543) - ( 27 \(\times\) 48 + 48 \(\times\) 73)
A = 10 000 - 48 \(\times\) ( 27 + 73)
A = 10 000 - 48 \(\times\) 100
A = 100 \(\times\) ( 100 - 48)
A = 100 \(\times\) 52
A = 5200
A = 3457 - 27 48 - 48 73 + 6543
A =(3457 + 6543) - ( 27 48 + 48 73)
A = 10 000 - 48 ( 27 + 73)
A = 10 000 - 48 100
A = 100 ( 100 - 48)
A = 100 52
A = 5200
HT!
3457 - 27 x 48 - 48 x 73 + 6543 = ???????
giúp mk với
đơn giản mà
3457-(27.48)-(48.73)+6543=5200