a) 81 + 243 + 19 = (81 + 19) + 243
= 100 + 143 = 243
b) 168 + 79 + 132 = (168 + 132) + 79
= 300 + 79 = 379
c) 5 x 25 x 2 x 16 x 4 = (5 x 2) x (25 x 4) x 16
= 10 x 100 x 16 = 16000
d) 32 x 47 + 32 x 53 = 32 x (47 + 53)
= 32 x 100 = 3200
e) 26 + 27 + 28 + 29 + 30 + 31 + 32 = (26 + 32) + (27 + 31) + (28 + 30) + 29
= 58 + 58 + 58 + 29
= 58 x 3 + 29 = 174 + 29 = 203
a) 81 + 243 + 19
= 81 + 19 + 243
= 100 + 243
= 343
b) 168 + 79 + 132
= ( 168 + 132 ) + 79
= 300 + 79
= 379
a . ( 81 + 19 ) + 243 b . ( 168 + 132 ) + 79 c. ( 5 x2 ) x ( 25 x 4 ) x 16
= 100 + 243 = 300 + 79 = 10 x 100 x 16
= 343 = 379 = 16000
d . 32 x ( 47 + 53 )
= 32 x 100 = 3200
a)81+243+19 b)168+79+132 c)5x25x2x16x4 d)32x47+32x53
= (81+19)+243 = (168+132)+79 = (5x2)x(25x4)x16 = 32x(47+53)
= 100 +243 = 300+79 = 10x100x16 =32x100
=343 =379 =16000 =3200
c) 5 x 25 x 2 x 16 x 4
= ( 5 x 2 ) x ( 25 x 4 ) x 16
= 10 x 100 x 16
= 1000 x 16
= 16000
a,
81+243+19
=(81+19)+243
=100+243
=343
b, 168+79+132
=(168+132)+79
=300+79
=379
c,5x25x2x16x4
=(5x2)x(25x4)x16
=10x100x16
=1000x16
=16000
d,32x47+32x53
=32x(47+53)
=32x100
=3200
e, 26+27+28+29+30+31+32
=26+27+(28+32)+(29+31)+30
=26+27+60+60+30
=203
bn tính lại nha
a) 81 + 243 + 19
= ( 81 + 19 ) + 243
= 100 + 243
= 343
b) 168 + 79 +132
= ( 168 + 132 ) + 79
= 300 + 79
= 379
c) 5 x 25 x 2 x16 x 4
= ( 5 x 2 ) x ( 25 x 4 ) x 16
= 10 x 100 x 16
= 1000 x 16
= 16000
d) 32 x 47 + 32 x 53
= 32 x ( 47 + 53 )
= 32 x 100
= 3200
e) 26 + 27 + 28 +29 + 30 + 31 + 32
= 26 + ( 27 + 32 ) + ( 28 + 31 ) + ( 29 + 30 )
= 26 + 59 + 59 + 59
= 26 + 59 x 3
= 26 + 177
= 203
k mk nha
b.169 + 79 + 132
=(169 + 79) + 132
=248 + 132
= 380
c. 5 x 25 x 2 x x16 x 4
=(25 x 4) x (2 x 5) x 16
=100 x 10 x 16
=16000
d.32 x 47 + 32 x 53
=32 x (47 + 53)
=32 x 100
=3200
e.26 + 27 + 28 + 29 + 30 + 31 + 32
=(26 + 32) + (27 + 31) + (28 + 30) + 29
=58 x 3 + 29
=174 + 29
=203
a) 81 + 243 + 19 = (81 + 19) + 243 = 100 + 243 = 343
b) 168 + 79 + 132 = (168 + 132) + 79 = 300 + 79 = 379
c) 5x 25 x 2 x 16 x 4 = (5 x 2) x ( 25 x 4) x 16 = 10 x 100 x 16 = 16000
d) 32 x 47 + 32 x 53 = 32 x (47 + 53) = 32 x 100 = 3200
e) 26 + 27 + 28 + 29 + 30 + 31 + 32 = (26 + 27 + 30) + (28 + 32) + (29 + 31) = 83 + 60 + 60 = 203
c) 5 x 25 x 2 x 16 x 4
= ( 5 x 2 ) x ( 25 x 4 ) x 16
= 10 x 100 x 16
= 1000 x 16
= 16000
Mai Hồng Ngọc
a) 81 + 243 + 19
= (81 + 19) + 243
= 100 + 143
= 243
b) 168 + 79 + 132
= (168 + 132) + 79
= 300 + 79
= 379
c) 5 x 25 x 2 x 16 x 4
= (5 x 2) x (25 x 4) x 16
= 10 x 100 x 16
= 16000
d) 32 x 47 + 32 x 53
= 32 x (47 + 53)
= 32 x 100
= 3200
e) 26 + 27 + 28 + 29 + 30 + 31 + 32
= (26 + 32) + (27 + 31) + (28 + 30) + 29
= 58 + 58 + 58 + 29
= 58 x 3 + 29
= 174 + 29
= 203