20 Đề thi Học Kì I Toánlớp 5 có lời giải chi tiết (Đề số 17)

$\begin{array}{c}100\\ -\underset{¯}{26,042}\\ 73,958\end{array} \begin{array}{c}6,127\\ \times \underset{¯}{\text{\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}38}}\\ 49016\\ \underset{¯}{18381}\\ 232,826\end{array}100 – 26,042 = 73,958 6,127 x 38 = 232,826\begin{array}{c}216,72\left(\begin{array}{c}\underset{¯}{4,2}\\ 51,6\end{array}\right)\\ 0672\\ 2520\\ 000\end{array} \begin{array}{c}17,36\\ +275,34\\ \underset{¯}{0,8}\\ 293,50\end{array}216,72:4,2=51,6 17,36+275,34+0,8=293,50$

a) 

$\begin{array}{c}\underset{}{\underbrace{\left(56,41+169,7\right)}}:12\\ =225,48:12\\ =18,79\end{array}$

b) 

$\begin{array}{c}6993:315\times 2,5+61,7\\ =\underset{}{\underbrace{22,2\times 2,5}}+61,7\\ =55,2+61,7\\ =117,2\end{array}$

Đáp án B