\(1000 − 345 + 345 : y = 655 + 345 : 5\)

\(655 + 345 : y = 655 + 69\)

\(345 : y = 655 + 69 − 655\)

\(345 : y = ( 655 − 655 ) + 69\)

\(345 : y = 0 + 69\)

\(y = 345 : 69\)

\(y = 5\)

`#Ya`

\(303-3\cdot\left[655-\left(\dfrac{18}{2}+1\right)\cdot64+5\right]\)

\(=303-3\cdot\left(655+5-10\cdot64\right)\)

\(=303-3\cdot\left(660-640\right)\)

\(=303-3\cdot20\)

\(=303-60\)

\(=243\)

nhanh lên nha

\(303-3.\left\{\left[655-\left(18:2+1\right).4^3+5\right]\right\}:10^0\)

\(=303-3.\left\{\left[655-\left(9+1\right).4^3+5\right]\right\}:10^0\)

\(=303-3.\left\{\left[655-10.64+5\right]\right\}:1\)

\(=303-3.\left\{\left[655-640+5\right]\right\}\)

\(=303-3.\left\{\left[15+5\right]\right\}\)

\(=303-3.20\)

\(=303-60=243\)

303 - 3.{[655 - (18 : 2 + 1) . 4³ + 5]} : 10⁰

= 303 - 3.(655 - 10.4³ + 5)

= 303 - 3.(655 - 640 + 5)

= 303 - 3.20

= 303 - 60

= 243

=1000:y=200

y=1000:200

y=5

y=5 sai chắc à mà đúng

1000-345+345:y=655+345:5

1000-345+345:y=724

345+345:y=1000-724

345:y=276-345

y=345-131

y=214

\(303-3:\left(655-10.64+5\right):10^0\)

\(=303-3:\left(655-640+5\right):1\)

\(=303-3:20\)

\(=\frac{6057}{20}\)

học tốt

303 - 3 : (665 - 640 + 5) : 1

303 - 3 : (25 + 5) : 1

303 - 3 : 30 : 1

303 -  0,1 : 1

303 -  0,1

302,9

303 - 3 : { [ 655 - 10 . 64 + 5 ] } : 10⁰

= 303 - 3 : { [ 655 - 640 + 5 ] } : 10

= 303 - 3 : { [ 15 + 5 ] } : 10

= 303 - 3 : { 20 : 10 }

=  303 - 3 : 2

= 303 - 1,5

= 301,5

Đáp án cần chọn là: D

\(428\times97+428\times2+428\)

\(=428\times\left(97+2+1\right)\)

\(=428\times100\)

\(=42800\)

\(995\times5+4\times5+5\)

\(=5\times\left(995+4+1\right)\)

\(=5\times1000\)

\(=5000\)

\(655\times6-355\times6\)

\(=6\times\left(655-355\right)\)

\(=6\times300\)

\(=1800\)

428.97 + 428.2 + 428 

= 428.97+428.2+428.1

= 428.(97+2+1)

= 428.100

= 428

995.5 +4.5 +5 

= 995.5 +4.5 +5.1

= 5.(995+4+1)

= 5. 1000

= 5000

655.6 - 355.6 

= 6. ( 655-355)

= 6. 300

= 1800

Dấu " . " = x

428 x 97 + 428 x 2 + 428

= 428(97+2+1)

=428 x 100

= 42800

995 x 5 + 4 x 5 + 5

= 5(995+4+1)

= 5 x 1000

= 5000

655 x 6 - 355 x 6

=(655-355)x6

= 300 x 6

= 1800