Question

[đoàn kiều oanh]

35x47+35x53 -100x25

65,75-[15,25+5,75]

32x48+32x52+15x50

Answer 1

[Dương Lam Hàng]

\(35\times47+35\times53-100\times25\)

\(=35\times\left(47+53\right)-100\times25\)

\(=35\times100-100\times25\)

\(=100\times\left(35-25\right)=100\times10=1000\)

\(65,75-\left(15,25+5,75\right)\)

\(=65,75-5,75-15,25\)

\(=60-15,25\)

\(=44,75\)

\(32\times48+32\times52+15\times50\)

\(=32\times\left(48+52\right)+15\times50\)

\(=32\times100+15\times50\)

\(=32\times100+7,5\times2\times50\)

\(=32\times100+7,5\times100\)

\(=100\times\left(32+7,5\right)=100\times39,5=3950\)

Answer 2

[harigon]

   35 x 47 + 35 x 53 - 100 x 25 

= 35 x ( 47 + 53 - 25 )

= 35 x 75

= 2625

   65,75 - ( 15,25 + 5,75 )

= 65,75 - 21

= 44,75

   32 x 48 + 32 x 52 + 15 x 50

= 32 x ( 48 + 52 ) + 15 x 50

= 32 x 100 + 15 x 50

= 3200 + 750

= 3950