7689 x ( 6 + 4 ) = 7689 x 10 = 76890

7689*6+4*7689=76890

x- 5688=7689

=> x=13377

đáp số x= 13377

x-5688=7689 nen x=5688+7689=13377

a) 3 506 x 25 x 4 

= 3 506 x (25 x 4)

= 3 506 x 100

b) 467 x 46 + 467 x 54

= 467 x (46 + 54)

=467 x 100

 = 46700

a) 3 506 x 25 x 4

=   3506.100

=350600

b) 467 x 46 + 467 x 54

= 467.(46+54)

=467.100

=46700

=61818

Chuk emm hok tốt!

= 61818

a) 467 + x = 877 – 162

467 + x = 715

x = 715 – 467

x = 248

b) x – 214 = 61 + 345

x – 214 = 406

x = 406 + 214

x = 620

c) x : 5 = 10 × 2

x : 5 = 20

x = 20 × 5

x = 100

d) x × 4 = 30 – 10

x × 4 = 20

x = 20 : 4

x = 5

500x6+500x4-108:12:9

=500x(6+4)-9:9

=500x10-1

=5000-1

=4999

9782x35-9782x25+1000:5:2

=9782x(35-25)+200:2

=9782x10+100

=97820+100

=97920

37800:25:4+57+467x43

=1512:4+57+20081

=378+57+20081

=435+20081

=20516

 x : 28 = 467 ( dư 30 )

x         = 467 x 28 +30

x         = 13106

#HT#

\(\left(a\right)314+345\cdot10\div2=314+345\cdot5=314+1725=2039\)

\(\left(b\right)467-421\cdot100\div5=467-421\cdot20=467-8420=-7953\)

Trả lời:

a,\(314+345\times10\div2\)

\(=314+345\times5\)

\(=314+1725\)

\(=2039\)

b, \(467-421\times100\div5\)

\(=467-421\times20\)

\(=467-8420\)

\(=-7953\)

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