《2025年阳光同学计算小达人四年级数学下册人教版》

1. 口算。（建议2分钟完成）
$1.3 + 2.1 =$ $8.7 - 3.5 =$ $0.12 + 0.23 =$ $3.9 + 0.33 =$
$51.7×100 =$ $2.8 + 3.9 =$ $8.3÷100 =$ $5.5 - 4.15 =$
$8 - 3.2 =$ $10.3×10 =$ $10.2 - 6.2 =$ $3.28 - 0.8 =$
$3.4 + 6.6 =$ $8.9 + 9.4 =$ $3.7 + 7.3 =$ $6 - 2.96 =$
$4.3 - 0.25 =$ $1000×5.6 =$ $6.9÷10 =$ $14.7 + 3 =$

答案： 3.4@@5.2@@0.35@@4.23@@5170@@6.7@@0.083@@1.35@@4.8@@103@@4@@2.48@@10@@18.3@@11@@3.04@@4.05@@5600@@0.69@@17.7

2. 用竖式计算。（建议6分钟完成）
$4.5 + 27.89 =$ $64.1 - 25.37 =$ $16.48 + 23.5 =$
$\underline{+\ \ \ \ \ \ \ \ \ \ \ }$ $\underline{-\ \ \ \ \ \ \ \ \ \ \ }$ $\underline{+\ \ \ \ \ \ \ \ \ \ \ }$
$13.56 - 9.76 =$ $20.83 + 14.96 =$ $72.97 - 30.8 =$
$34 - 12.78 =$ $9.65 + 12.7 =$ $19.37 - 8.4 =$

答案： 32.39@@38.73@@39.98@@3.8@@35.79@@42.17@@21.22@@22.35@@10.97

#### 巧算
$8.58 - (6.58 - 0.69)$ $7.53 - (3.5 - 2.47)$

答案： 2.69@@6.5