1. 直接写出得数。
58 + 29 =
83 - 66 =
71 - 26 =
105 - 76 - 28 =
72 - 34 =
290 + 280 =
16 + 43 =
5 × 9 × 4 =
122 ÷ 2 =
39 × 3 =
6 × 17 =
37 + 19 + 45 =
44 × 5 =
408 ÷ 4 =
160 ÷ 5 =
6 × 20 - 20 =
210 ÷ 3 =
16 × 7 =
496 ÷ 2 =
140 ÷ 5 - 2 =
14 × 9 =
54 ÷ 2 =
53 × 6 =
82 ÷ 2 × 4 =
101 - 58 =
500 ÷ 2 =
615 ÷ 5 =
5 × (70 - 20) =
8 × 32 =
8 × 109 =
224 ÷ 7 =
(360 + 30) ÷ 3 =

1. 87 17 45 1
38 570 59 180
61 117 102 101
220 102 32 100
70 112 248 26
126 27 318 164
43 250 123 250
256 872 32 130

2. 计算下面各题。
$189÷9+206$
$486÷(27÷3)$
$26×(35-30)$
$68+32×6$
$336×6+94$
$560÷(887-880)$

2. 227 54 130
260 2110 80

下面的物体分别是由几个小正方体摆成的？
（）个 （）个 （）个

9 8 10