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a) \(8\times5\times345=40\times345=13800\)
b) \(6\times333\times5=30\times333=9990\)
c) \(38483\times4\times25=38483\times100=3848300\)
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`5 xx 74 xx 2 = 5xx 2 xx 74 = 10xx74 = 740`
`4xx196xx5 = 4xx5xx196 = 20xx196 = 3920`
`(50 + 25)xx4 = 50xx4 + 25xx4 = 200 + 100 = 300`
`125xx(80+8) = 125xx80 + 125xx8 = 10000 + 1000 = 11000`
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21+22+23+24+25+26+9+8+7+6+5+4 =180
mình thấy rồng con lon ton làm đúng đấy
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a) 8 × 5 × 9 = (8 × 5) × 9 = 40 × 9 = 360
b) 6 × 7 × 5 = (6 × 5) × 7= 30 × 7= 210
c) 6 × 4 × 25 = 6 × (4 × 25) = 6 × 100= 600
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\(125\times25\times8\times4\)
\(=\left(125\times8\right)\times\left(25\times4\right)\)
\(=1000\times100\)
\(100000\)
125 x 25 x 8 x 4
= (125 x 8) x (25 x 4)
= 1000 x 100
= 100 000
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35 x 20 x 5 8 x 9 x 125 25 x 7 x 4 72:(8x3)
= 35 x ( 20 x5 ) = ( 8x125) x 9 = (25x4)x7 = 72: 24
= 35 x 100 = 1 000 x 9 = 100x7 = 3
= 3 500 = 9 000 =700
(36x7):4
=36: 4 x 7
= 9 x7
= 63
35 x 20 x 5 = 35\(\times\)(20 \(\times\)5)= 35 \(\times\)100=3500
8 \(\times\)9 \(\times\) 125 =(8\(\times\) 125)\(\times\)9=1000\(\times\)9=9000
25 \(\times\)7\(\times\)4=(25 \(\times\)4)\(\times\)7=100\(\times\)7=700
72 : (8\(\times\)3)=72 : 8 x 3 =(72:8) x 3=9 x 3=27
(36 x 7) : 4 =36 x 7 : 4 =7 x (36 :4)=7 x 9=63
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a, 5 x 4 x 2 x 25
= (5 x 2) x (4 x 25)
= 10 x 100
= 1 000
4 × 5 × 1250 × 25 × 8
= ( 4x25) x (1250x8) x5
= 100x10000x5
=1000000x5
= 5000000
4 x 5 x 1250 x 25 x 8
= (4 x 25) x (1250 x 8) x 5
= 100 x 10000 x 5
= 1000000 x 5
5000000