`235 xx 46 + 30 xx 765 - 235 xx 16`

`235xx46-235xx16+30xx765`

`235xx(46-16)+30xx765`

`235xx30+30xx765`

`30xx(235+765)`

`30xx100`

`3000

235*<30+5>

=235*35

=8225

a) (–30) + (–5) = –(30 + 5) = –35.

b) (–7) + (–13) = – (7 + 13) = –20;

c) (–15) + (–235) = –(15 + 235) = –250.

235 × 46 + 30 ÷ 765 - 235 × 16
= 10810 + 2/51 - 3760
= 359552/51

Ai biết giúp tui sos

= 10810 + \(\dfrac{2}{51}\) - 3760

= \(\dfrac{359552}{51}\)

a) \(30\times1235\times4-8\times235\times15\)

\(=120\times1235-120\times235\)

\(=120\times\left(1235-235\right)\)

\(=120\times1000\)

\(=120000\)

b) \(\left(120\times99+120\right)-185\times101+185\)

\(=120\times\left(99+1\right)-185\cdot\left(101-1\right)\)

\(=120\times100-185\times100\)

\(=12000-18500\)

\(=-6500\)

a) 30 x 1235 x 4 - 8 x 235 x 15

=(30x4) x 1235 - (8x15)x235

= 120 x 1235 - 120 x 235

=120 x (1235-235)

=120 x 1000

=120000

b) ( 120 x 99 +120)  - 185 x 101-185

=(120 x 99 + 120) - (185x101+185)

=120x(99+1) - 185x(101+1)

=120 x 100-185x102

=12000-18870

= -(18870-12000)

= -6870

\(\left(x+35\right)\times5=235-35=200\)

\(x+35=\dfrac{200}{5}=40\)

\(x=40-35=5\)

67E7

(x+35)×5=235−35=200(x+35)×5=235−35=200

x+35=200/50=40x+35=2005=40

x=40−35=5

X x 5 = 235                                                      X : 3 = 173

      X = 235 : 3                                                      X = 173 x 3

      X = 47                                                                   X = 519

a) Tính:

235 × (30 + 5) = 235 × 30 + 235 × 5 = 7050 + 1175 = 8225

5327 × (80 + 6) = 5327 × 80 + 5327 × 6 = 426160 + 31962 = 458122

b) Tính theo mẫu

4367 × 31 = 4367 × (30 + 1) = 4367 × 30 + 4367 × 1 = 131010 + 4367 = 135377

a, -35

b, -20

c, -250

k nha ok @@@@@@@@@@@@@