0.1+0.3+0.5+0.7+0.9+0.11+0.13+…+0.99=______.
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0.1+0.3+0.5+0.7+0.9+0.11+0.13+…+0.99=______.
![0.1+0.3+0.5+0.7+0.9+0.11+0.13+…+0.99=______.](/uploads/image/z/1649405-29-5.jpg?t=0.1%2B0.3%2B0.5%2B0.7%2B0.9%2B0.11%2B0.13%2B%E2%80%A6%2B0.99%3D______%EF%BC%8E)
0.1+0.3+0.5+0.7+0.9+0.11+0.13+…+0.99
=(0.1+0.3+0.5+0.7+0.9)+(0.11+0.13+…+0.99)
=2.5+(0.11+0.99)×45÷2
=2.5+24.75
=27.25.
故答案为:27.25.
=(0.1+0.3+0.5+0.7+0.9)+(0.11+0.13+…+0.99)
=2.5+(0.11+0.99)×45÷2
=2.5+24.75
=27.25.
故答案为:27.25.
0.1+0.3+0.5+0.7+0.9+0.11+0.13+…+0.99=______.
125×(4+8)=______×______+______×______.
填质数:21=______+______=______×______=______-______.
4500平方米=______公顷______分=0.1小时=______秒.
0.5周角=______平角=______直角=______度.
0.5公顷=______平方米; 2.35时=______时______分.
计算:121×0.13+12.1×0.9-12×1.21=______.
小数的计数单位是______、______、______….
3.76°=______度 ______分 ______秒.
填上适当的质数.24=______+______=______+______=______+______.
巧填单位名称.1______-59______=1______;1______-9______=1______;1___
0.87×99+0.87=______×______.