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`@` `\text {Ans}`
`\downarrow`
`456 \div2\times18 + 456\div3 - 102`
`= 456\times0,5\times18 + 456\times1/3 - 102`
`= 456\times (0,5 \times 18 + 1/3) - 102`
`= 456 \times(9 + 1/3) - 102`
`= 456 \times28/3 - 102`
`= 4256 - 102`
`= 4154`
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\(37\times7+80\times3+34\times7\)
\(=7\times\left(37+34\right)+80\times3\)
\(=7\times71+240\)
\(=497+240\)
\(=737\)
a)
37 x 7 + 80 x 3 + 34 x 7
= 7 x (37 + 34) + 80 x 3
= 7 x 71 + 240
= 497+ 240
= 737
b)
123 x 456 + 456 x 321 - 256 x 444
= 456 x (123 + 321) - 256 x 444
= 456 x 444 - 256 x 444
= 444 x (456 - 256)
= 444 x 200
= 88800
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456 + |58 + (-456) + (-38)|
= 456 + |58 + (-38) + (-456)|
= 456 + |58 - 38 + (-456)|
= 456 + |20 + (-456)|
= 456 + |-436|
= 456 + 436
= 892
456 + [58 + (-456) + (-38)] = 456 + [58 + (-494)]
= 456 + (-436)
= 20
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499 x 338 + 449 x 661 + 999 x 448
= 168662 + 329839 + 447552
= 498501 + 447552 = 946053
(728+277) x 2011 - (456+544) x 1010 - 389 -611
= 1005 x 2011 - 1000 x 1010 - 389 - 611
= 2021055 - 1010000 - 389 - 611
= 2021055 - ( 1010000 + 389 + 611 )
= 2021055 - 1011000
= 1010055
đúng thì like cho vs nha thanks nhìu
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![](https://rs.olm.vn/images/avt/0.png?1311)
a, 512*(2-128)-128*(-512)
= 512*2 - 512*128 -128*(-512)
=512*2-512*128-(-128)*512
= 512*(2-128+128)
= 512*2
=1024
b, 2155-(174+2155)+(-68+174)
=2155-174-2155+(-68)+174
= (2155-2155)+[(-174)+174]+(-68)
=0+0+(-68)
=-68
c,-78+11*(97-99)
=-78+11*(-2)
=-78+(-22)
=-100
d, |+426|+|-345|+|+456|+|-789|
= 426+345+456+789
=(426+345)+(456+789)
=771+1245
=2016
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Tính nhanh
1001 * 789 + 456 * 128 + 912 * 436
1001 . 789 + 456 . 128 + 912 .436 = 1245789
k nha
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A = [ -506 + 732 - ( -2000 )] - ( 506 - 1732 )
A = [ 226 - ( -2000 )] - ( 506 - 1732 )
A = 2226 - ( -1226 )
A = 3452
B = 38 + 41 + 117 + 159 + 62
B = ( 38 + 62 ) + (41 + 159) + 117
B = 100 + 200 + 117
B = 417
C = 73 + 86 + 968 + 914 + 3032
C = ( 86 + 914 ) + ( 968 + 3032 ) + 73
C = 1000 + 4000 + 73
C = 5073
D = 123 x 456456 - 456 x 123123
D = 123x456x1001-456x123x1001
D = 56088 x 1001 - 56088 x 1001
D = 1001x ( 56088 - 56088 )
D = 1001 x 0
D = 0
F = 1000 x ( 456 x 789789 -789 x 456456 )
F = 1000 x 0
F =0
= 181488
chúc bạn học tốt
456x398
=181488