25×44用简便方法 2.9+29乘以29怎么用简便方法做？

2.9+29乘以29怎么用简便方法做？  

2.9+29乘以29怎么用简便方法做？

2.9+29×29
=2.9+（30-1）²
=2.9+900-60+1
=843.9

532乘以29用简便方法怎么算

532X29
=532X30-532X1
=15960-532
=15428

38乘以29减去30乖以29减29用简便方法1

29X（38-30-1）=29X7=203

29乘以51减29怎样用简便方法计算

29x51-29
=29x(51-1)
=29x50
=1450

45乘以29用简便发@方法计算

45x29
=45x(30-1)
=45x30-45x1
=1350-45
=1305
望采纳，谢谢^_^

83乘以29简便方法计算,

83x29
=83x30-83
=2490-83
=2407

89减29乘以376的简便方法?

（89-29）×376
=60×376
=22560

5.4乘以19.9+0.54怎么用简便方法

5.4乘以19.9+0.54
=5.4*19.9+5.4*0.1
=5.4*(19.9+0.1)
=5.4*20
=108

29加以71乘以61的简便方法

29加以71乘以61的简便方法
29加以71乘以61
=29+71*61
=29+4331
=4360

62除以58乘以29的简便方法

62除以58乘以29
=62÷（58÷29）
=62÷2
=31