-  1/4+17/50 +31/100=25/100+34/100+31/100 =90/100=0,9

-   3/4 +15/40+69/300=0,75+0,375+0,23=1,355

-    42/700+45/120+17/80=0,06+0,375+0,2125 = 0,6475

k cho mk vs

a) 24 + 17 + 26 = (24 + 26) + 17

                         = 50 + 17

                         = 67

b) 80 + 310 + 120 + 90 = (80 + 120) + (310 + 90)

                                    = 200 + 400

                                     = 600

c) 34 + 140 + 60 + 16 = (34  + 16) + (140 + 60)

                                  = 50 + 200

                                  = 250

dequa ban oi

mình có ý kiến ?

26,72 + \(\frac{13}{100}\) + \(\frac{21}{40}\)

= 26,72 + 0,13 + 0,525

= 26,85 + 0,525

= 27,375

\(\frac{1}{4}+\frac{17}{50}+\frac{31}{100}\)

= 0,25 + 0,34 + 0,31

= 0,59 + 0,31

= 0,9

\(\frac{3}{4}+\frac{15}{40}+\frac{69}{300}\)

= 0,75 + 0,375 + 0,23

= 1,125 + 0,23

= 1,355

\(\frac{42}{700}+\frac{42}{120}+\frac{17}{80}\)

= 0,06 + 0,35 + 0,2125

= 0,41 + 0,2125

= 0,6225

cảm ơn bạn

mình có ý kiến?

a)26,72+13/100 +21/40 = 5344/200+26/200+105/200=(5344+26+105)/200=219/8=27,375
c)3/4+15/40+69/300=150/200+75/200+46/200=(150+75+46)/200=271/200=1,355

SAO KO AI GIẤP MÌNH THẾ LÀM ƠN GIÚP MÌNH VỚI

Bạn tính ra đi

*\(26,72+\frac{3}{100}+\frac{21}{40}\)=\(26,72+0,03+\frac{21}{40}=\frac{1091}{40}=27,275\)

*\(\frac{1}{4}+\frac{17}{50}+\frac{31}{100}\)=\(\frac{25}{100}+\frac{34}{100}+\frac{31}{100}=\frac{90}{100}=0,9\)

*\(\frac{3}{4}+\frac{15}{40}+\frac{69}{300}=0,75+0,375+0,23\)=\(1,355\)

*\(\frac{42}{700}+\frac{45}{120}+\frac{17}{80}=\)\(0,06+0,375+0,2125=0,6475\)

a ) 5 x 216 x 25 x 4 = 1080 x 100 = 108000

b ) 37 x 16 x 25 x 4 = 592 x 100 = 59200

c ) 36 x ( 28 + 82 ) + 64 x ( 69 + 41 ) = 36 x 110 + 64 x 110 = ( 36 + 64 ) x 110 = 100 x 110 = 11000

d ) 42 x ( 53 + 36 + 11 ) = 42 x 100 = 4200

e) 37 x 45 + 56 x 37 - 37 x 1 = 37 x ( 45 + 56 - 1 ) = 37 x 100 = 3700

h) 17 x 1 + 17 x 81 + 18 x 17 = 17 x ( 1 + 81 + 18 ) = 17 x 100 = 1700

Mik nhanh nhất đấy , nhớ click cho mik nha !!!!!!!!!!!!!!!!!!!

a) 5 x 25 x 216 x 4

= ( 5 x 216 ) x ( 25 x 4 )

= 1080 x 100

= 108000

b) 4 x 37 x 25 x 16 

= ( 4 x 25 ) x ( 37 x 16 )

= 100 x 592 

= 59200

a)=(25x4)x5x216=100x5x216=500x216=108000

b)=(4x25)x37x16=100x37x16=3700x16=59200

c)=[36x(28+82)]+[64x(69+41)]=[36x110]+[64x110]=110x(36+64)=110x100=11000

d)=42x(53+36+11)=42x100=4200

e)=37x(45+56-1)=37x100=3700

h)=17x(1+81+18)=17x100=1700

k mk nhá

\(1,=461\times\left(42+58\right)=461\times100=46100\\ 2,=396\times\left(37-17\right)=396\times20=7920\)

*Note: Tích của một số với 0 luôn bằng 0.

a) \(\left(1763+7634+23\cdot764\right)\cdot\left(346\cdot45-173\cdot90\right)\)

\(=\left(1763+7634+23\cdot764\right)\cdot\left(346\cdot45-173\cdot45\cdot2\right)\)

\(=\left(1763+7634+23\cdot764\right)\cdot\left(346\cdot45-346\cdot45\right)\)

\(=\left(1763+7634+23\cdot764\right)\cdot0\)

\(=0\)

b) \(N=10\cdot12\cdot14\cdot16\cdot\left(88\cdot17-44\cdot34\right)\)

\(N=10\cdot12\cdot14\cdot16\cdot\left(88\cdot17-44\cdot17\cdot2\right)\)

\(N=10\cdot12\cdot14\cdot16\cdot\left(88\cdot17-88\cdot17\right)\)

\(N=10\cdot12\cdot14\cdot16\cdot0\)

\(N=0\)

c) \(\left(80\cdot96+40\cdot1808\right):1000\)

\(=\left(80\cdot96+40\cdot904\cdot2\right):1000\)

\(=\left(80\cdot96+80\cdot904\right):1000\)

\(=\left[80\cdot\left(96+904\right)\right]:1000\)

\(=80\cdot1000:1000\)

\(=80\)