26 Đề thi học kì I môn Toán lớp 5 cực hay, có lời giải chi tiết (Đề số 16)

$\begin{array}{c}607,3\\ \underset{¯}{-98,48}\\ 508,82\end{array} \begin{array}{c}15,78\\ +\underset{¯}{76,24}\\ 92,02\end{array}$

607,3 – 98,48 = 508,82           15,78 + 76,24 = 92,02

$\begin{array}{c}0,365\\ \times \underset{¯}{26}\\ 2190\\ \underset{¯}{0730}\\ 9,490\end{array} \begin{array}{c}8640\left(\begin{array}{c}\underset{¯}{2,4}\\ 360\\ \end{array}\right)\\ 144\\ 000\end{array}$

0,365 x 26 = 9,490             8640 : 2,4 = 360

$126,43\times 0,1=12,643126,43\times 0,01=1,2643126,43\times 0,001=0,1264364,58:10=6,458172,3:100=1,7232333,7:1000=2,3337$

$a, \begin{array}{c}56,85<x<58,42\\ x=57\end{array}b,\frac{235,48+48,502}{2}=141,991$

10,34dm = 1,034m

9,5481km = 9548,1m

28,063km = 28063m

0,762hm = 76,2m

$\frac{3}{5}=\frac{60}{100}=60\%\frac{7}{10}=\frac{70}{100}=70\%\frac{1}{4}=\frac{25}{100}=25\%\frac{4}{2}=\frac{200}{100}=200\%$