一、直接写出得数。(共32分)
6300 - 500 = 42 - 23 = 48 + 68 = 20×15 - 26 =
204×8 = 37 + 58 = 2100 - 900 = 31×20×2 =
24×60 = 40×61 = 290×3 = 50×4×2 =
500×5 = 105÷3 = 44×4 = 20×0×11 =
20×34 = 80×13 = 155÷5 = 80×6 + 20 =
6×29 = 42×20 = 162÷3 = 30×7×5 =
17×50 = 66×2 = 30×25 = 90×2 + 18 =
68×69 ≈ 49×61 ≈ 41×72 ≈ 90×3 - 15 =

5800 19 116 274 1632 95 1200 1240 1440 2440 870 400 2500 35 176 0 680 1040 31 500 174 840 54 1050 850 132 750 198 4900 3000 2800 255

二、用竖式计算,带☆的要验算。(共20分)
46×44 = 70×59 = ☆24×78 =
98×26 = 15×78 = ☆48×99 =

2024 4130 1872 2548 1170 4752 竖式及验算略

三、排一排。(填序号)(共8分)
1. ① 28×34 ② 43×28 ③ 43×82 ④ 34×82
()＜()＜()＜()
2. ① 59×60 ② 50×90 ③ 56×69 ④ 69×65
()＞()＞()＞()

1. ① ② ④ ③ 2. ② ④ ③ ①