(32-18)乘(9+15)怎么简便计算

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(32-18)乘(9+15)怎么简便计算

(32-18)乘(9+15)怎么简便计算
(32-18)乘(9+15)怎么简便计算

(32-18)乘(9+15)怎么简便计算
(32-18)乘(9+15)
=14x24
=(10+4)x24
=240+96
=334

(32-18)×(9+15)
=2(16-9)(15+9)
=2(15-9)(15+9)+2(15+9)
=2×(15ˇ2-9ˇ2)+2×24
=2×(225-81)+48
=2×144+48
=288+48
=336

(32-18)x(9+15)
=14x24
=(10+4)x24
=240+96
=334