$\begin{array}{llll}32 + 5 = & 24 + 3 = & 15 + 42 = & 30 + 24 = \\35 + 2 = & 23 + 4 = & 12 + 45 = & 34 + 20 = \\32 + 50 = & 23 + 40 = & 57 - 12 = & 54 - 20 =\end{array}$

37 27 57 54 37 27 57 54 82 63 45 34

$\begin{array}{llll}23 + 30 = & 59 - 8 = & 34 + 6 = & 57 - 20 + 4 = \\47 - 3 = & 65 - 7 = & 83 - 50 = & 84 + 9 - 6 = \\38 - 5 = & 76 - 9 = & 55 - 32 = & 37 - 8 + 5 = \\7 + 44 = & 29 - 17 = & 42 - 6 = & 45 - 7 - 9 = \\9 + 46 = & 30 + 28 = & 60 - 8 = & 74 + 6 + 12 =\end{array}$

53 51 40 41 44 58 33 87 33 67 23 34
51 12 36 29 55 58 52 92

1. 比大小。
$62 - 8 ◯ 24 + 30 \quad 58 + 5 ◯ 36 + 30 \quad 73 - 7 ◯ 58 + 9$
$46 + 7 ◯ 47 + 6 \quad 28 + 3 ◯ 41 - 9 \quad 59 - 20 ◯ 28 + 8$

1. = ＜ ＜ = ＜ ＞

2. 填一填。
$\begin{array}{lll}7 + □ = 66 & 50 + □ = 67 & 15 + □ = 55 - 20 \\□ - 5 = 43 & 78 - □ = 13 & 53 - 8 = 49 - □ \\□ + 6 = 31 & □ + 22 = 54 & 68 + □ = 81 - 9\end{array}$

2. 59 17 20 48 65 4 25 32 4