《2025年一本暑假计算加应用题四年级数学北师大版》

1. 直接写出得数。(每题 1★)
$0.7 + 0.9 = $1.6 $10 - 4.19 = $5.81 $6×0.5 = $3
$0.6×0.8 = $0.48 $0.21×0.3 = $0.063 $0.35×0.4 = $0.14
$3.9 + 1.7 = $5.6 $1.4×0.2 = $0.28 $36÷100 = $0.36
$0.75×2 = $1.5 $0.201×10 = $2.01 $5.13 + 4.27 = $9.4
$1.62 + 0.38 = $2 $7.1×0.7 = $4.97 $0.13÷10 = $0.013
$4.37 + 1.93 = $6.3 $4.3×0.2 = $0.86 $8.42 - 5.62 = $2.8

答案： 1.6 5.81 3
0.48 0.063 0.14
5.6 0.28 0.36
1.5 2.01 9.4
2 4.97 0.013
6.3 0.86 2.8

2. 解方程。(每题 4★)
$x + 12.54 = 51$ $x = 38.46$ $5x = 85$ $x = 17$ $x÷21 - 3.54 = 4.46$ $x = 168$
$4x - 13 = 43$ $x = 14$ $6.5 + 3x = 84.5$ $x = 26$ $(x + 1.7)×2 = 10$ $x = 3.3$

答案： $ x = 38.46 $ $ x = 17 $ $ x = 168 $
$ x = 14 $ $ x = 26 $ $ x = 3.3 $

3. 计算下面各题,能简算的要简算。(每题 3★)
$8.78 - (2.78 - 0.89)$ $0.75×52.8 - 4.28×7.5$ $4.83×9.9$

答案： 6.89 7.5 47.817