《2025年53天天练二年级数学下册苏教版》

$\begin{cases}31 + 40 = \\71 + 6 = \\31 + 46 = \end{cases}$
$\begin{cases}43 + 20 = \\63 + 7 = \\43 + 27 = \end{cases}$
$\begin{cases}24 + 30 = \\54 + 7 = \\24 + 37 = \end{cases}$
$\begin{cases}63 - 10 = \\53 - 2 = \\63 - 12 = \end{cases}$
$\begin{cases}72 - 40 = \\32 - 3 = \\72 - 43 = \end{cases}$
$\begin{cases}49 - 40 = \\9 - 2 = \\49 - 42 = \end{cases}$
$\begin{cases}75 + 9 = \\84 - 9 = \end{cases}$

答案： 方法练：71 77 77 63 70 70
54 61 61 53 51 51
32 29 29 9 7 7 84 75

$46 + 17 =$
$63 - 44 =$
$44 + 49 =$
$52 - 35 =$
$39 + 26 =$
$54 - 18 =$
$58 + 15 =$
$95 - 83 =$
$44 + 37 =$
$82 - 35 =$
$48 + 36 =$
$16 + 27 =$
$30 - 11 =$
$72 - 18 =$
$29 + 47 =$
$35 - 26 =$
$45 + 49 =$
$53 - 48 =$
$61 - 26 =$
$59 - 28 =$

答案： 新知练：63 19 93 17 65 36 73 12
81 47 84 43 19 54 76 9
94 5 35 31