1. 直接写出得数。
37 + 73 = 560 + 350 = 1000 - 720 = 500 + 35 × 20 =
84 - 26 = 90 × 30 = 70 × 15 = 88 ÷ 4 × 50 =
48 × 5 = 30 × 48 = 121 × 4 = 16 × 2 × 5 =
111 ÷ 3 = 105 × 8 = 309 × 8 = 400 ÷ (4 + 4) =
450 × 4 = 366 ÷ 6 = 340 × 2 = 360 ÷ 6 × 25 =
96 × 2 = 4500 - 700 = 29 × 6 = 15 × (4 + 86) =
90 × 23 = 118 × 2 = 320 ÷ 5 = 720 ÷ (3 × 3) =
42 × 60 = 65 × 50 = 225 × 3 = 90 × (35 + 35) =

1. 110 910 280 1200
58 2700 1050 1100
240 1440 484 160
37 840 2472 50
1800 61 680 1500
192 3800 174 1350
2070 236 64 80
2520 3250 675 6300

2. 计算下面各题。
(189 - 153) × 42 551 - (226 + 78) 624 ÷ 8 + 496
716 + 39 × 12 (44 + 18) × 27 863 - (548 - 367)

2. 1512 247 574
1184 1674 682

3. ()里最大能填几?
40 × () ＜ 300 60 × () ＜ 490 70 × () ＜ 560
230 ＞ () × 50 140 ＞ () × 20 720 ＞ () × 80
30 × () ＜ 210 90 × () ＜ 810 20 × () ＜ 120

3. 7 8 7
4 6 8
6 8 5