a, 298+132+237+868+763

= 298+(132+868)+(237+763)

=298+1000+1000

=298+1000×2

=298+2000

=2298

b, 35×68+35×31+35

=35×68+35×31+35×1

=35×(68+31+1)

=35×100

=3 500

c, 35×34+35×66

=35×(34+66)

=35×100

=3 500

d, ( 563+745)-(463+545)

= 563 + 745 - 463 - 545

= (563-463) + (745-545)

= 100 + 200

= 300

e, 73+86+968+914+3032

= 73+(86+914)+(968+3032)

=73+1000 + 4000

=73+5000

=5073

f, 4×8×25×1,25×27

= (4×25)×(8×1,25)×27

=100×10×27

=1000×27

=27 000

a, 2289

b, 3500

c, 3500

d, 300

e, 5073

f, 27000

\(a,289+132+237+868+763=289+\left(132+868\right)+\left(763+237\right)\)

\(=289+1000+1000=289+2000=2289\)

\(b,=35\times\left(68+31+1\right)=35\times100=3500\)

\(c,=35\times\left(34+66\right)=35\times100=3500\)

\(d,=563+745-463-545=\left(563-463\right)+\left(745-545\right)\)

\(=100+200=300\)

\(e,=73+\left(86+914\right)+\left(968+3032\right)=73+1000+4000=5073\)

\(f,=\left(4\times25\right)\times\left(8\times1,25\right)\times27=100\times10\times27=27000\)

5676+654=6330

k mình nhé!

Thank you very much!

5676 + 654 = 6330

k và kết bạn mk nha mk hết lượt rồi

5676+654=6330

k nha!

\(\left(545-x:2\right):25=17\)

\(545-x:2=425\)

\(x:2=120\)

\(x=120\times2\)

\(x=240\)

25+52+56+545=678

ủng hộ tớ nhé 

  25 + 52 + 56 + 545

= 77 + 56 + 545

= 133 + 545

= 678

Dress : 678

Answer : 678

số đó là

678

ai muốn k thì k cho mình đã

545 - 412 : 25 = 528,52

bằng 528,52 tick cho mình nha

545-412 :25=545-16,48

                   =528.52

tick cái nha

`(545 -x:2xx5):25 =17`

`545 -x:2xx5=17xx25`

`545-x:2xx5=425`

`x:2xx5=545-425`

`x:2xx5=120`

`x:2=120:5`

`x:2=25`

`x=25xx2`

`x=50`

bạn tính sai r