《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）
$8.9 - 3.4 =$ $7.5 + 4.5 =$ $0.38 + 0.25 =$ $0.14 + 0.26 =$
$11 - 6.6 =$ $9.5 - 3.7 =$ $0.79 - 0.19 =$ $0.85 - 0.77 =$
$5.8 + 1.4 =$ $3.6 + 2.4 =$ $0.52 - 0.48 =$ $8.24 + 3.7 =$

答案： 5.5@@12@@0.63@@0.4@@4.4@@5.8@@0.6@@0.08@@7.2@@6@@0.04@@11.94

2. 用竖式计算。（建议6分钟完成）
$24 - 3.63 =$ $3.49 + 6.75 =$ $52.2 - 30.68 =$
$6.9 + 2.83 =$ $26.71 - 18.5 =$ $4.36 + 8.97 =$
$56 - 23.45 =$ $43.7 + 22.13 =$ $90 - 15.68 =$

答案： 20.37@@10.24@@21.52@@9.73@@8.21@@13.33@@32.55@@65.83@@74.32

在$\square$里填上合适的数字，使竖式成立。

答案：

$12.48 + 7.74 =$ $75 - 15.49 =$ $25.12 - 18.5 =$
$\underline{+\ \ \ \ \ \ \ \ \ \ \ \ }$ $\underline{-\ \ \ \ \ \ \ \ \ \ \ \ }$ $\underline{-\ \ \ \ \ \ \ \ \ \ \ \ }$
$98 + 11.93 =$ $52.36 + 17.9 =$ $87.93 - 64 =$
$109.7 + 2.39 =$ $50 - 27.39 =$ $5.23 + 4.07 =$
$36 - 0.94 =$ $25.4 - 13.46 =$ $15.42 - 7.38 =$
$27.03 - 7.69 =$ $69.47 - 54.8 =$ $126.74 + 9.8 =$

答案： 20.22@@59.51@@6.62@@109.93@@70.26@@23.93@@112.09@@22.61@@9.3@@35.06@@11.94@@8.04@@19.34@@14.67@@136.54