32 . 41+ 46.73 + 32.59 +73.54

=32.(41+59)+73.(46+54)

=32.100+73.100 

=100.(32+73)

=100.105 = 10500

32*41+46*73+32*59+73*54

=(32*(41+59))+(73*(54+46))

=(32*100)+(73*100)

=3200+7300

=11500 k cho minh nha thuuuuuuuuuuu

Đáp số là: \(10500\)(Chúc bạn may mắn nhá!)

1. tính nhanh

a) 64,25+35,25+25

=64,25+60,25

=(60,25+4) +60,25

=60,25+4

=64,25

\(a.64\cdot25+35\cdot25+25\)

\(=25\cdot\left(64+35+1\right)\)

\(=25\cdot100\)

\(=2500\)

\(b.58\cdot42+32\cdot58+58\cdot16\)

\(=\) \(58\cdot\left(42+32+16\right)\)

\(=58\cdot90\)

\(=5220\)

BÀI 2

\(890:x=35\left(dư15\right)\)

\(=>\left(890-15\right):x=35\)

\(875:x=35\)

\(x=875:35\)

\(x=25\)

b,c tương tự

234  - ( 34 - 20 . x ) = 100

               34 - 20 . x = 234 - 100

               34 - 20 . x = 134

                       20 . x = 34 - 134

                       20 . x = -100

                              x = -100 : 20

                              x = -5

34-20.x=234-100

34-20.x=134

20.x=34-134

20.x=-100

x=-100:20

x=-5

X= -5

k mik nha

Học tốt

^_^

\(\frac{4,8\left(1994+3996+4010\right)}{\left(\frac{99-3}{4}+1\right)\left(\frac{99+3}{2}\right)-11.25}=\frac{48000}{25.51-11.25}=\frac{48000}{1000}=48\)

\(\left(x-4\right)^9=49.\left(x-4\right)^7\\ =>\left(x-4\right)^9:\left(x-4\right)^7=49\\ =>\left(x-4\right)^2=49\\ =>\left[{}\begin{matrix}x-4=7\\x-4=-7\end{matrix}\right.\\ =>\left[{}\begin{matrix}x=11\\x=-3\end{matrix}\right.\)

              (x - 4)⁹ = 49 . (x - 4)⁷

(x - 4)⁹ : (x - 4)⁷ = 49

              (x - 4)² = 7² = (-7)²

TH1 :                                                    TH2 :

(x - 4)² = 7²                                          (x - 4)² = (-7)²

    x - 4 = 7                                                x - 4 = -7

         x = 7 + 4                                               x = -7 + 4

         x = 11                                                   x = -3

    Vậy x = 11                                          Vậy x = -3

A. ( x - 34 ) . 15 = 0

      x - 34           = 0

      x                  = 0 + 34

      x                  = 34

Vậy x = 34

B. 18 ( x - 16 ) = 18

           x - 16    = 18 : 18

           x - 16    = 1

           x           = 1 + 16

           x           = 17

Vậy x = 17

A. ( x - 34 ) . 15 = 0

x - 34 = 0 . 15

x - 34 = 0

x = 34

B . 18 . ( x - 16 ) = 18

x - 16 = 18 : 18

x - 16 = 1

x = 17

a) ( x - 34 ) . 15 = 0

=> x - 34 = 0

=> x = 34

b) 18( x - 16 ) = 18

=> x - 16 = 1

=> x = 17

giúp mình nha

\(34\left(2x-6\right)=0\)

\(2x-6=0\)

\(2x=6\)

\(x=3\)

 T i c k mk nha ^^

datnguyen2k6

34( 2x - 6 ) = 0 

=> 2x - 6    = 0 

=> 2x          = 0 + 6 

=> 2x         = 6 

=>   x         = 6 : 2 

=>   x         = 3 

a)300

b)374

c)4747

d)4530

e)2250

g)123123

Đây là toán lớp 4

a) 300

b) 374

c) 4747

d) 4530

e) 2250

g) 123123

a) 25 x 12 = 25 x 4 x 3 = 100 x 3 = 300

b) 34 x 11 = 34 x ( 10 + 1 ) = 34 x 10 + 34 x1 = 340 + 34 = 374

c) 47 x 101 = 47 x ( 100 + 1 ) = 47 x 100 + 47 x 1 = 4700 + 47 = 4747

d) 15 x 302 = 15 x ( 300 + 2 ) = 15 x 300 + 15 x 2 = 4500 + 30 = 4530

g) 123 x 1001 = 123 x ( 1000 + 1 ) = 123 x 1000 +123 x 1 = 123000 + 123 = 123123

\(\text{a/96-3(x+1)=42}\)

\(3\left(x+1\right)=54\)

\(x+1=54:3\)

\(x+1=18\)

\(\Rightarrow x=17\)

\(\text{b/2.x-18=20}\)

\(2x=38\)

\(x=38:2\)

\(x=19\)

\(\text{c/134-5.(x+4)=34}\)

\(5\left(x+4\right)=100\)

\(x+4=100:5\)

\(x+4=20\)

\(\Rightarrow x=16\)

học tốt