《2025年阳光同学计算小达人五年级数学下册冀教版》

1. 直接写出得数。（建议3分钟完成）
- $2.5×2 =$ $6.5 + 0.35 =$ $9÷0.45 =$ $0.45 - 0.2 =$
- $26÷2.6 =$ $3.54 - 0.46 =$ $300×0.18 =$ $5×4.4 =$
- $3.4×0.4 =$ $0.32÷0.04 =$ $12.5×0.2 =$ $3.5×6 =$
- $5 - 1.71 =$ $6.6÷30 =$ $2.3×4 =$ $2.9×0.3 =$
- $52×0.01 =$ $0.56×2 =$ $10.5 - 5 =$ $4.5×0.002 =$

答案： 5@@6.85@@20@@0.25@@10@@3.08@@54@@22@@1.36@@8@@2.5@@21@@3.29@@0.22@@9.2@@0.87@@0.52@@1.12@@5.5@@0.009

2. 解方程。（建议4分钟完成）
- $7x + 5x = 1.44$ $23×4 + 2x = 102$ $6x - 50 = 130$
- $2.9x - 1.5x = 2.1$ $8x - 14×5 = 170$ $0.4×1.5 + 0.9x = 9.6$

答案： $x = 0.12$@@$x = 5$@@$x = 30$@@$x = 1.5$@@$x = 30$@@$x = 10$

用简便方法计算。
$8.88×6.25 - 44.4$ $55.5 - 48×1.11$ $5.4×1.1 - 0.33×15$

答案： 提升练 11.1 2.22 0.99