要用简便算法:41.2×8.1+9 1/4+53.7×1.9 9 1/4=九又四分之一1.9和9 1/4是分开的,9 1/4=九又四分之一是备注
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![要用简便算法:41.2×8.1+9 1/4+53.7×1.9 9 1/4=九又四分之一1.9和9 1/4是分开的,9 1/4=九又四分之一是备注](/uploads/image/z/2679102-54-2.jpg?t=%E8%A6%81%E7%94%A8%E7%AE%80%E4%BE%BF%E7%AE%97%E6%B3%95%EF%BC%9A41.2%C3%978.1%2B9+1%2F4%2B53.7%C3%971.9+9+1%2F4%3D%E4%B9%9D%E5%8F%88%E5%9B%9B%E5%88%86%E4%B9%8B%E4%B8%801.9%E5%92%8C9+1%2F4%E6%98%AF%E5%88%86%E5%BC%80%E7%9A%84%EF%BC%8C9+1%2F4%3D%E4%B9%9D%E5%8F%88%E5%9B%9B%E5%88%86%E4%B9%8B%E4%B8%80%E6%98%AF%E5%A4%87%E6%B3%A8)
要用简便算法:41.2×8.1+9 1/4+53.7×1.9 9 1/4=九又四分之一1.9和9 1/4是分开的,9 1/4=九又四分之一是备注
要用简便算法:41.2×8.1+9 1/4+53.7×1.9 9 1/4=九又四分之一
1.9和9 1/4是分开的,9 1/4=九又四分之一是备注
要用简便算法:41.2×8.1+9 1/4+53.7×1.9 9 1/4=九又四分之一1.9和9 1/4是分开的,9 1/4=九又四分之一是备注
41.2×8.1+9又 1/4+53.7×1.9
=41.2×8.1+9.25+(41.2+12.5)×1.9
=41.2×8.1+41.2×1.9+12.5×1.9+9.25
=41.2×(8.1+1.9)+1.25×19+1.25+8
=41.2×10+1.25×(19+1)+8
=412+8+1.25×20
=420+25
=445
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- ★ more exciting content you light my space ★ ,mac cosmetics wholesale
- [B] [B] [B] [B] Click to enter Click to enter the wonderful wonderful movie game space space
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