2025年通城学典计算能手六年级数学上册苏教版江苏专版第5页答案
一、口算。
$8.4÷0.4 = $
21
$4.5÷0.9 = $
5
$0.5÷(4.2 - 1.7) = $
0.2

$5×4 = $
20
$12.5×0.2 = $
2.5
$25×3.3×4 = $
330

$6.7 + 0.33 = $
7.03
$1.52÷0.08 = $
19
$2 - 0.64 - 0.36 = $
1

$12.6 - 0.9 = $
11.7
$3.4×0.4 = $
1.36
$37.2×99 + 37.2 = $
3720

$6.5×0.2 = $
1.3
$0.42÷7 = $
0.06
$0.9 + 0.9÷0.3 = $
3.9

$0.9 + 2.01 = $
2.91
$2.97÷10 = $
0.297
$20.85 - (3.7 + 1.85) = $
15.3

$\frac{5}{9} - \frac{1}{6} = $
$\frac{7}{18}$
$\frac{2}{9} + \frac{4}{15} = $
$\frac{22}{45}$
$\frac{1}{2} + \frac{1}{3} + \frac{1}{4} = $
$\frac{13}{12}$

$\frac{2}{3} + \frac{5}{14} = $
$\frac{43}{42}$
$\frac{5}{7} - \frac{2}{5} = $
$\frac{11}{35}$
$\frac{17}{18} - (\frac{1}{2} + \frac{1}{18}) = $
$\frac{7}{18}$

答案

21 5 0.2 20 2.5 330 7.03 19 1 11.7 1.36 3720 1.3 0.06 3.9 2.91 0.297 15.3 $\frac{7}{18}$ $\frac{22}{45}$ $\frac{13}{12}$ $\frac{43}{42}$ $\frac{11}{35}$ $\frac{7}{18}$
二、计算长方体和正方体的表面积。

答案

$2.5×2.5×6=37.5(cm^{2})$ $(3.6×4.4+3.6×5.5+4.4×5.5)×2=119.68(cm^{2})$