《2025年一本暑假计算加应用题五年级数学北师大版》

1. 直接写出得数。(每题 1★)
$5×4×5= $100 $5×5×6= $150 $4×4×25= $400 $2×3×5= $30
$5×6×7= $210 $6×6×5= $180 $12×5×3= $180 $6×5×8= $240
$1.2×5×2= $12 $5.4×0.2×5= $5.4 $1.6×5×2= $16 $0.3×3×10= $9
$4×6×8= $192 $8×8×8= $512 $8×6×2= $96 $9×8×5= $360
$5×0.2×4= $4 $3×4×5= $60 $4.2×5×4= $84 $6×6×6= $216
$2.5×4×12= $120 $12×5×8= $480 $12.5×15×8= $1500 $18×2×5= $180

答案： 100 150 400 30
210 180 180 240
12 5.4 16 9
192 512 96 360
4 60 84 216
120 480 1500 180

2. 计算下面各题,能简算的要简算。(每题 3★)
$\frac {3}{8}+\frac {5}{9}+\frac {5}{8}$ $\frac {3}{4}+\frac {5}{9}-\frac {4}{9}$ $11-\frac {5}{13}-\frac {8}{13}$
$\frac {9}{7}-\frac {11}{15}-\frac {4}{15}$ $\frac {11}{15}+(\frac {4}{5}-\frac {8}{15})$ $\frac {9}{13}-\frac {5}{12}+\frac {4}{13}$

答案： $1\frac{5}{9}$ $\frac{31}{36}$ 10
$\frac{2}{7}$ 1 $\frac{7}{12}$

3. 解方程。(每题 3★)
$\frac {3}{5}+\frac {1}{2}-x= \frac {1}{4}$，$x=$$\frac{17}{20}$
$x+\frac {1}{2}+\frac {1}{4}= \frac {5}{6}$，$x=$$\frac{1}{12}$
$x+\frac {1}{3}+\frac {1}{4}= 1$，$x=$$\frac{5}{12}$

答案： $x=\frac{17}{20}$ $x=\frac{1}{12}$ $x=\frac{5}{12}$