Question

[trần thuỳ dương]

tính bằng cách thuận tiện:

a)105x52+105x48=

b)174x83+83x326=

c)25x132-25x23=

d)2x8x50x25x125=

Answer 1

[Toru]

a) $105\times52+105\times48$

$=105\times(52+48)$

$=105\times100$

$=10500$

b) $174\times83+83\times326$

$=83\times(174+326)$

$=83\times500$

$=41500$

c) $25\times123-25\times23$ (sửa đề)

$=25\times(123-23)$

$=25\times100$

$=2500$

d) $2\times8\times50\times25\times125$

$=(2\times50)\times(8\times125)\times25$

$=100\times1000\times25$

$=100000\times25$

$=2500000$

Answer 2

[Trần Hoàng Yến]

a 105 × 52 + 105 × 48

= 105 × ( 52 + 48 ) 

= 105 × 100 = 1050