=47 x (52+49-1)=47x 100= 4700

47 x 52 + 47 x 49 - 47

= 47 x 52 + 47 x 49 - 47 x 1

= 47 x (52+49-1)

= 47 x 100

= 4700

4700 kết quả học t

` 10000 – 47 xx 72 – 47 xx 28 `
`=10000-47xx(72+28)`
`=10000-47xx100`
`=100xx100-47xx100`
`=100xx(100-47)`
`=100xx53`
`=5300`

`10 000 - 47 xx 72 - 47xx28`

`=10 000 - 47 xx(72+28)`

`=10 000 - 47xx100`

`=10 000 - 4700`

`=5300`

 10000 – 47 x 72 + 47 x 28 

=10000-(47x(72+28)

=10000-4700

=5300

\(35600:25:4\)
\(=35600:\left(25\times4\right)\)
\(=35600:100\)
\(=356\)

35600 : 25 : 4

= 35600 : ( 25 x 4 )

=  35600 : 100

=  356

35600 : 25 : 4

= 35600 : ( 25 × 4 )

= 35600 : 100

= 356

TL

1 x 47 + 2 x 47 + 2 x 47 + 3 x 47 + 4 x 47=47x`(1+2+2+3+4)

                                                                 =47x12

                                                                 =564

nha bn

HT

= 47.(1+2+3+4)=47.10=470

ok = (1+2+3+4) x 47=470

40025 - 25000 : 125 : 8

=40025 - 25000 : [125 nhân 8]

=40025 - 25000 : 1000

=40025 - 25

= 40000

chúc bạn học tốt

40025-25000:125.8

=40025-25000:(125.8)

=40025-25000:1000

=40025-25

=40000

47 x 298 + 53 x 298

= 298 x (47 + 53)

= 298 x 100 

= 29 800

\(47\times298+53\times298=298\times\left(47+53\right)\)

\(=298\times100=29800\)

47 x 298 + 53 x 298

=( 47 + 53 ) x 298

= 100 x 298

= 29 800

a) 25 × 34 × 4 = 25 × 4 × 34 = 100 × 34 = 3400

b) 128 × 93 + 128 × 7 = 128 × (93 + 7) = 128 × 100 = 12800

c) 57 × 63 - 47 × 63 = 63 × (57 – 47) = 63 × 10 = 630

`5/17 xx 21/4 xx 47/15 xx 0`

`= (5/17 xx 21/4) xx  (47/15 xx 0)`

`= (5/17 xx 21/4) xx 0`

`=0`