a] 28 X ( 231 + 69 ) + 72 x( 231+ 69
b] 8x9x14+6x17x12+19x4x18
c] 19×64+76×34
d] 136×68+16×272
e] 867-(167 + 80 )
g] (527 + 49 )- 127
h] (1+3+5=…..+9 ) x ( 24×222-48×111)
tính nhanh
a] 28 X ( 231 + 69 ) + 72 x( 231+ 69 b] 8x9x14+6x17x12+19x4x18 c] 19×64+76×34 d] 136×68+16×272 e] 867-(167 + 80 ) g] (527 + 49 )- 127 h] (1+3+5=
By Josie
a] 28 X ( 231 + 69 ) + 72 x( 231+ 69)
= 28×300+72×300
=8400+21600
=30000
b] 8x9x14+6x17x12+19x4x18
=1008+1224+1368
=3600
c] 19×64+76×34
=1216+2584
=3800
d] 136×68+16×272
=9248+4352
=13600
e] 867-(167 + 80 )
=867-247
=620
g] (527 + 49 )- 127
=576-127
=440
h](1+3+5=…..+9 ) x ( 24×222-48×111)
= 25 x ( 5328 – 5328 )
= 25 x 0
= 0
a] 28 X ( 231 + 69 ) + 72 x( 231+ 69
b] 8x9x14+6x17x12+19x4x18
c] 19×64+76×34
d] 136×68+16×272 e] 867-(167 + 80 )
g] (527 + 49 )- 127
h] (1+3+5=…..+9 ) x ( 24×222-48×111)
Đáp án+Giải thích các bước giải:
a] 28 X ( 231 + 69 ) + 72 x( 231+ 69)
=300x(28+72)
=300×100
=30000
b] 8x9x14+6x17x12+19x4x18
=1008+1224+1368
=3600
c] 19×64+76×34
=1216+2584
=3800
d] 136×68+16×272
=9248+4352
=13600
e] 867-(167 + 80 )
=867-247
=820
g] (527 + 49 )- 127
=400+49
=449
h] (1+3+5=…..+9 ) x ( 24×222-48×111)
=25x(0x111-24×00)
=25×0
=0
Vote 5sao+cảm ơn+ câu trả lời hay nhất cho mình nhé!