a, 28(231+69)+72(231+69)
=231+69.(28+72)
=231+69.100
=231+6900
=7131
b, 39(250+87)+64(240+97)
=39.337+64.337
=337(39+64)
=337.103
=34711
a, 28(231+69)+72(231+69)
=231+69.(28+72)
=231+69.100
=231+6900
=7131
b, 39(250+87)+64(240+97)
=39.337+64.337
=337(39+64)
=337.103
=34711
Tính hợp lý
a.28.(231+69)+72.(169+31)
b.39.(250+87)+61.(240+97)
Tính
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
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
28.(231+69)+72.(60+240)
28 . ( 231 + 69 ) + 72 . ( 231 + 69 )
tính nhanh
\(28.\left(231+69\right)+72.\left(231+69\right)\)
giúp mik với, tick 3 bạn đầu
Tính nhanh
28.(231+69) +72(231+69)
tính hợp lí
a.12.25+29.25+59.25=
b.28.(231+69)+72.(231+69)=
c.49.27+51.27+27=
d.53.11
79.101
28.(231+61)+(69+231).72
tính thuận tiện