Question

tính nhanh 

1) 12.2.25+29.25+59.25

2) 25.(231+69)+72.(231+69)

3) 39.(250+87)+64.(240+97)

4) 36.28+36.82+64.69+64.41

Answer 1

1) 12 x 2 x 25 + 29 x 25 + 59 x 25

= 24 x 25 + 29 x 25 + 59 x 25

= 25 x ( 24 + 29 + 59 )

= 25 x 112

= 2800

2) 25 x ( 231 + 69 ) + 72 x ( 231 + 69 )

= 25 x 300 + 72 x 300

= ( 25 + 72 ) x 300 

= 29100

3)39 x ( 250 + 87 ) + 64 x ( 240 + 97 )

= 39 x 337 + 64 x 337

= ( 39 + 64 ) x 337

= 103 x 337

= 34711

Answer 2

tính nhanh 

1) 12.2.25+29.25+59.25

2) 25.(231+69)+72.(231+69)

3) 39.(250+87)+64.(240+97)

4) 36.28+36.82+64.69+64.41

1) 12 x 2 x 25 + 29 x 25 + 59 x 25

= 24 x 25 + 29 x 25 + 59 x 25

= 25 x ( 24 + 29 + 59 )

= 25 x 112

= 2800

2) 25 x ( 231 + 69 ) + 72 x ( 231 + 69 )

= 25 x 300 + 72 x 300

= ( 25 + 72 ) x 300 

= 29100

3)39 x ( 250 + 87 ) + 64 x ( 240 + 97 )

= 39 x 337 + 64 x 337

= ( 39 + 64 ) x 337

= 103 x 337

= 34711

Answer 3

1) 12 x 2 x 25 + 29 x 25 + 59 x 25

= 24 x 25 + 29 x 25 + 59 x 25

= 25 x ( 24 + 29 + 59 )

= 25 x 112

= 2800

2) 25 x ( 231 + 69 ) + 72 x ( 231 + 69 )

= 25 x 300 + 72 x 300

= ( 25 + 72 ) x 300 

= 29100

3)39 x ( 250 + 87 ) + 64 x ( 240 + 97 )

= 39 x 337 + 64 x 337

= ( 39 + 64 ) x 337

= 103 x 337

= 34711