85x82+82x15
82x(15+85)=8200
5x289x2
5x2x289=2890
(125x5)x4
125x(5x4)=2500
25x97+25x3
25x(97+3)=2500
88x102
88x100+88x2=8960
125x88
125x8+125x80=22000
378+527+73
378+(527+73)=978
167+289+33
167+33+289=489
58+39+42+61
(58+42)+(39+61)=200
76x25+25x24
(76+24)x25=2500
(1)30+25=55
(2)30x25x40=3000
(3）砖的面积是多少啊,1800/12=150 然后用花园的面积除砖的面积在比较