Question

14×66+72×33怎么用简便方法计算？

Answer 1

简便计算
14×66+72×33
=14x2x33+72x33
=（28+72）x33
=100x33
=3300

Answer 2

乘法分配律为：两个数的和与一个数相乘，先将它们与这个数分别相乘，再相加，积不变．即：（a+b）×c=a×c+b×c．反过来则：a×c+b×c=（a+b）×c
14 ×66+72×33
= 14×2 ×33+72×33
= 33× ( 28+72）
= 33×100
= 3300