927+116+753=1796 nha chị em học lớp 3

927+116+753
= 116+(927+753)
= 116+1680
=1796

\(\frac{5}{4}+\frac{7}{12}+\frac{7}{5}+\frac{75}{100}+\frac{40}{25}+\frac{20}{48}\)

\(=\frac{5}{4}+\frac{7}{12}+\frac{7}{5}+\frac{3}{4}+\frac{8}{5}+\frac{5}{12}\)

\(=\left(\frac{5}{4}+\frac{3}{4}\right)+\left(\frac{7}{12}+\frac{5}{12}\right)+\left(\frac{7}{5}+\frac{8}{5}\right)\)

\(=\frac{8}{4}+\frac{12}{12}+\frac{15}{5}\)

\(=2+1+3\)

\(=6\)

Đặt A=5/4 + 7/12 + 7/5 + 75/100 + 40/25 + 20/48

=>A=125/100 + 28/48 + 35/25 + 75/100 + 40/25 + 20/48

=>A=(125/100 + 75/100) + (28/48 + 20/48) + (35/25 + 40/25)

=>A=        2                     +            1             +           3

=>A=                    6

Vậy A=6

246 x 81 + 246 x 20 - 246

= 246 x (81 + 20 - 1)

= 246 x 100

= 24600

HT và $$$

112 + 50 +38

= ( 112 + 38 ) + 50

= 150 + 50

= 200

HT

112 +50+38

=(112+38)+50

=150+50

=200

456375+3956-56-375

=456375--375+3956-56

=456000+3900

=                4 59900

\(79\times11+2800\times40\)

\(=869+112000\)

\(=112869\)

Sai đề rùi nhé bạn

50 x 10 - 30 x 10 = 10 ( 50 - 30 ) = 10 x 20 = 200

ỦNG HỘ MK NHA MK TRẢ LỜI ĐẦU TIÊN NÈ

50 x 10 - 30 x 10 = ( 50 - 30 ) x 10 

                         =        20     x 10 

                         =              200

7 x 5 x 36 + 35 x 42 + 35 x 22

= 35 x 36 +35 x 42 + 35 x 22

= 35 x ( 36 + 42 + 22 )

= 35 x 100 

= 3500

Ta co 7*5*36+35*42+35*22

=35*36+35*42+35*22

=35*(36+42+22)=35*100

=3500 cho minh

TL:

67+12+33

(67+33)+12

=100+12

=112

-HT-

= ( 67 + 33 ) + 12

= 100 + 12

= 112