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35x34+35x34+65x75+65x45
= (35 x 34 + 35 x 34) + (65 x 75 + 65 x 45)
= 35 x 34 x 2 + 65 x (75 + 45)
= 2380 + 65 x 120
= 2380 + 7800
= 10180
35x34+35x34+65x75+65x45
= (35 x 34 + 35 x 34) + (65 x 75 + 65 x 45)
= 35 x 34 x 2 + 65 x (75 + 45)
= 2380 + 65 x 120
= 2380 + 7800
= 10180
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a. (286 : 11 +7 x 2) x 3 - 13
= (26 + 14) x 3 - 13
= 40 x 3 - 13
= 120 - 13
= 107
b. 35 x 34 + 65 x 75 + 35 x 38 + 65 x 45
= (35 x 34) + (65 x 75) + (35 x 38) + (65 x 45)
= 1190 + 4875 + 1330 + 2925
= (1190 + 1330) + (4875 + 2925)
= 2520 + 7800
= 10 320
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a) 12 x 53 + 53 x 172 - 53 x 84
= 53 x ( 12 + 172 - 84 )
= 53 x 100
= 5300
b) 35 x 34 + 35 x 95 + 65 x 75 + 65 x 54
= ( 35 x 34 + 35 x 95 ) + ( 65 x 75 + 65 x 54 )
= 35 x ( 34 + 95 ) + 65 x ( 75 + 54 )
= 35 x 129 + 65 x 129
= ( 35 + 65 ) x 129
= 100 x 129
= 12900
c) 86 x 7676 - 8686 x 76
= 86 x 76 x 101 - 86 x 101 x 76
= 0
d) 6969 x 45 - 4545 x 59
= 69 x 101 x 45 - 45 x 101 x 59
= 45 x 101 x ( 69 - 59 )
= 4545 x 10
= 45450
e) 351 x 67 + 351 x 16 + 649 x 83
= 351 x ( 67 + 16 ) + 649 x 83
= 351 x 83 + 649 x 83
= ( 351 + 649 ) x 83
= 1000 x 83
= 83000
f) 42 x 53 + 47 x 156 - 47 x 114
= 42 x 53 + 47 x ( 156 - 114 )
= 42 x 53 + 47 x 42
= 42 x ( 53 + 47 )
= 42 x 100
= 4200
g) 3851 : 500 + 1149 : 500
= ( 3851 + 1149 ) : 500
= 5000 : 500
= 10
h) 4783 : 300 - 1783 : 300
= ( 4783 - 1783 ) : 300
= 3000 : 300
= 10
câu cuối hơi sai nên bạn gửi lại câu đó nha
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d) 35x34 +35x38 + 65x75 + 65x45
= 35 x ( 34 + 38 ) + 65 x ( 75 + 45 )
= 35 x 72 + 65 x 120
= 2520 + 7800
= 10 320
d) 35x34 +35x38 + 65x75 + 65x45
= 35 ( 34 + 38 ) + 65 ( 75 + 45)
= 35 * 72 + 65 * 120
= 2520 + 7800
= 10320
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35x34+35x38+65x45+65x27
=35x(34+38)+65x(45+27)
=35x72+65x72
=72x(35+65)
=72x100
=7200
35 x 34 + 35 x 38 + 65 x 45 + 65 x 27
= 35 x ( 34 + 38 ) + 65 x ( 45 + 27 )
= 35 x 72 + 65 x 72
= ( 35 + 65 ) x 72
= 100 x 72
= 7200
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35 x 34 + 35 x 38 + 65 x 45 + 65 x 27
= 35 x (34 + 38) + 65 x ( 45 + 65)
= 35 x 72 + 65 x 110
= 2510 + 7150
= 9660
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a, 35.(34+86) +65.(75+45)= 35. 120 +65.120= 120.(35+65)=120.100=12000
a, 35x34+35x86+65x75+65x45
=35x(34+86)+65x(75+45)
=35x120+65x120
=120x(35+65)
=120x100
=12000
b,3x25x8+4x6x37+2x8x12
=24x25+24x37+24x8
=24x(25+37+8)
=24x70
=1680