a) 98 + 3 + 97 +2

= (98 +2) + ( 97 + 3)

= 100 + 100 = 200

56 + 399 + 1 + 4

= (56 + 4) +( 399 + 1)

= 60 + 400 = 460

b) 364 + 136 + 219 + 181

= (364 + 136) + (219 + 181

= 500 + 400 = 900

178 277 + 123 + 422

= (178 + 422) + (277 + 123)

= 600 + 400 = 1000

tính bang cach thuyen tien nhat;236+400+364=.......

\(a.98+3+97+2\)

\(=\left(98+2\right)+\left(97+3\right)\)

\(=100+100\)

\(=200\)

\(56+399+1+4\)

\(=\left(56+4\right)+\left(399+1\right)\)

\(=60+400\)

\(=460\)

\(b.364+136+219+181\)

\(=\left(364+136\right)+\left(219+181\right)\)

\(=500+400\)

\(=900\)

\(178+277+123+422\)

\(=\left(178+422\right)+\left(277+123\right)\)

\(=600+400\)

\(=1000\)

\(HocTot!!!\)

\(@VR\)

178 277 + 123 + 422

= (178 + 422) + (277 + 123)

= 600 + 400 = 1000

nhanh lên mình xin đấy

a) \(2900\times94+2900\times5+2900\)
\(=2900\times\left(94+5+1\right)\)
\(=2900\times100\)
\(=290000\)
b) \(34000:125:8\)
\(=34000:\left(125\times8\right)\)
\(=34000:1000\)
\(=34\)

a) 2900 x 94 + 2900 x 5 + 2900

= 2900 x ( 94 + 1 + 5 )

= 2900 x 100

290000

178 +277 + 123 + 422

= ( 178 + 422 ) + ( 277 + 123 )

= 600 +400

= 1000

`123 xx 137 - 123 xx 36 - 123`

`= 123 xx 137-123xx36-123xx1`

`=123xx(137-36-1)`

`=123xx100`

`=12300`

$#flo2k9$

`123 xx 137 - 123 xx 36 - 123`

= `123 xx ( 137 - 36 - 1 )`

= `123 xx 100`

= `12300`

\(123\times137-123\times36-123=123\times\left(137-36-1\right)=123\times100=12300\)

=9/4x2/3+16/9x4/3

=18/12+64/36

=54/36+64/36=118/36=59/18

 36/16 x 12/18 + 32/18 x 24/18 

\(=\dfrac{9}{4}\times\dfrac{2}{3}+\dfrac{16}{9}\times\dfrac{4}{3}\)

\(=\dfrac{3}{2}+\dfrac{64}{27}\)

\(=\dfrac{209}{54}\)

a) 19,17x25x4=19,17(25x4)=19,17x100=1917

b)1,79x(8x125)=1,79x1000=1790

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