Từ đề bài, ta suy ra:

-147.47+(-47).(-47)-300

=47(-147+47)-300

=47.-100-300

=-4700-300

=-5000

=100x47-47x47+47x47-300=4700-300=4400

=100x47-47x47+47x47-300=4700-300=4400

hok tốt

=-147x47+47x47

=47x(-147+47)

=47x(-100)

=-4700

a)

\(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{47}\\{35}\end{array}}\\\hline{\,\,\,\,82}\end{array}\)                                    \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{82}\\{47}\end{array}}\\\hline{\,\,\,35}\end{array}\)

\(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{526}\\{147}\end{array}}\\\hline{\,\,\,\,673}\end{array}\)                                \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{673}\\{147}\end{array}}\\\hline{\,\,\,526}\end{array}\)

b) 350 + 42 – 105 = 392 – 105 = 287

     1 000 – 300 + 77 = 700 + 77 = 777.

13+47-13+125-147

=(13-13)+(47-147)+125

=0+(-100)+125

=25

13+ 47-13+125-147.                  =(13-13)+(47-147)+125             =0+(-100)+125.                          =25

a) 56 x 147- 56 x 47 = 56 x(147- 47) + 134

                                 =56 x 100 +134

                                 =5734          

\(56.147-56.47+134=56.\left(147-47\right)+134=56.100+134=5600+134=5734\)

Thanks mấy bn trl giúp mik nha

\(=\frac{\left(147-47\right)^2}{\left(125-25\right)\left(125+25\right)}\)

\(=\frac{100^2}{100.150}\) \(=\frac{100}{150}=\frac{2}{3}\)

\(=\frac{147^2-2.47.147+47^2}{\left(125+25\right)\left(125-25\right)}=\frac{\left(147-47\right)^2}{150.100}=\frac{100^2}{150.100}=\frac{100}{150}=\frac{2}{3}.\)

-[275-147]-[47-275]

=-128-[-228]

=100

a) -(275-147)-(47-275)

= −128−(47−275)

= −128−(−228)

= 100

Vậy -(275-147)-(47-275)=100

Trả lời:

\(-\left(275-147\right)-\left(47-275\right)\)

\(=-275+147-47+275\)

\(=\left(275-275\right)+\left(147-47\right)\)

\(=0+100\)

\(=100\)

Hok tốt!

Good girl

a) 47.(-147) - 47.(-47)

= 47.(-147 + 47)

= 47 . (-100)

= -4700

b) 24.(15 - 4) + 4.(24 - 15)

= 24.15 - 25.4 + 4.25 - 4.15

= (24 - 4).15 - (25.4 - 4.25)

= 20 . 15

= 300

47(-147) - 47(-47)

= 47(-147 + 47)

= 47.(-100)

= -4700

a) 47.(-147)-47.(-47)

=47.(-147+47)

=47x(-100)

=-4700

b) 24.(15-4)+4.(24-15)

=24.11+4.9

=264+4.9

=264+36

=300

Tính nhanh:

49 x 47 - 47 x 47 -30 -17

= 47 x ( 49 - 47 ) - 30 - 17

= 47 x 2 - 30 - 17

= 94 - 30 - 17

= 64 - 17

= 47

nhớ k cho mình nha

49x47-47-30-17=47(49-1)-30-17

                         = 47x48-30-17

                          =2256-30-17=2209

49x47-47x30-30-17=49x47-47x47-(30+17)

=49x47-47x30-47=47x(49-47-2)=47x47=2209