30 Đề thi học kì 2 Toán lớp 5 có đáp án(đề 03)

$a)24,3\times 4=97,2$

$b)3250kg>$3 tấn 205 kg

$c)4ha<0,4k{m}^2$

$d)3,6km<36000m$

$\begin{array}{c}a)x+\frac{4}{5}=2,5\times 1,5\\ x+\frac{4}{5}=3,75\\ x=3,75-\frac{4}{5}\\ x=2,95\end{array}$

$\begin{array}{c}b) 4,775-x=4,775+3,6\times \left(0,01-\frac{1}{100}\right)\\ 4,775-x=4,775+3,6\times 0\\ 4,775-x=4,775\\ x=4,775-4,775\\ x=0\end{array}$