三年级下册数学计算能力大赛试题.docx

三年级下册数学计算能力大赛试题 小学三年级下册数学计算试题 比赛时间：9分钟 一、口算（共24.5分） 1.3 × 10 = 2.80 × 40 = 3.18 × 5 = 4.40 × 60 = 5.30 ÷ 10 = 6.13 × 4 = 7.25 × 20 = 8.160 × 4 = 9.300 ÷ 50 = 10.720 ÷ 90 = 11.16 × 6 = 12.180 ÷ 20 = 13.130 × 40 = 14.85 ÷ 5 = 15.57 ÷ 3 = 16.8 + 320 = 17.70 ÷ 5 = 18.25 × 4 = 19.15 × 6 = 20.450 ÷ 15 = 21.12 × 40 = 22.240 ÷ 60 = 23.84 ÷ 42 = 24.600 - 50 = 25.500 × 3 = 26.27 × 30 = 27.84 ÷ 12 = 28.420 ÷ 30 = 29.910 ÷ 91 = 30.91 - 59 = 31.11 × 70 = 32.1000 ÷ 5 = 33.320 - 180 = 34.230 × 40 = 35.40 + 580 = 36.95 ÷ 19 = 37.480 + 90 = 38.510 ÷ 17 = 39.2000 ÷ 72 = 40.72 ÷ 24 = 41.8000 ÷ 2 = 42.102 + 20 = 43.125 - 25 × 2 = 44.50 × 8 = 45.75 + 25 ÷ 5 = 46.45 + 55 ÷ 5 = 47.7 + 3 × 4 = 48.90 ÷ 5 × 3 = 49.6 × (103 - 98) = 50.70 × (40 - 32) = 51.420 ÷ 20 × 8 = 52.750 ÷ (70 + 80) = 二、笔算（共29分） 1.54 × 63 = 2.205 × 38 = 3.360 × 19 = 4.774 × 50 = 5.774 × 30 = 6.774 ÷ 90 = 7.774 × 60 = 8.774 × 930 = 9.774 ÷ 30 = 10.774 ÷ 15 = 11.774 ÷ 40 = 12.774 ÷ 40 = 13.774 ÷ 50 = 14.774 ÷ 47 × 12 = 15.774 ÷ 10 × 30 = 16.-4 × 6 ÷ 3 = 17.300 ÷ 2 ÷ 5 = 18.5240 × 38 = 19.206 ÷ 40 = 20.7809 ÷ 23 = 21.9730 ÷ 53 = 22.1770 ÷ 59 = 23.950 × 50 = 24.950 ÷ 78 = 25.950 ÷ 78 = 26.549 × 7 = 27.643 ÷ 7 = 28.2150 + 3892 = 29.2640 ÷ 50 = 三、估算（共6分） 1.32 × 5 ≈ 2.3610 ÷ 5 ≈ 3.984 × 6 ≈ 4.2760 ÷ 4 ≈ 5.2150 + 3892 ≈ 6.2640 ÷ 50 ≈ 四、计算与换算（共5.5分） 1.3日 = （）天 2.48个月 = （）年 3.35天 = （）星期 4.120时 = （）天 5.4时20分 = （）分 6.五月份 = （）月 7.1星期 = （）小时 8.12分 = （）秒 9.8年 = （）天 10.90分 = （）时（）分 五、脱式计算（1.5×12＝18分，每一步0.5分） 430 + 120 ÷ 4 × 7 = 581 2538 ÷ 18 - 7 × 8 = 141 15 × 40 - 360) ÷ 8 = 30 600 ÷ (96 ÷ 16 + 6) = 25 146 + 25 × 17 - 120 (45 × 79 - 175) ÷ 65 = 421 75 + 240 ÷ (20 - 5) 315 - 60 × 4 ÷ 15 = 305 7560 ÷ (125 - 113) + xxxxxxx × (50 - 40 ÷ 5) = xxxxxxx 117 - 17 × 36 ÷ 18 = 99 730 - 36 × 7 + 608 = 470 六、列式计算（2×6＝12分，列式、计算各1分） 1、(16 + 24) ÷ 8 = 5 2、400 - (170 + 80) = 150 3、64 × 14 - 522 = 802 4、(748 + 116) ÷ 32 = 28 5、25 × 5 ÷ 225 = 1/9 6、6 × 752 - 5172 = -204 七、填空（0.75×4＝3，1×2＝2，共5分） 1、在里填上数字，使算式成立。 1) 90 ÷ (27 ÷ 3) = 10 2) (40 - 18) ÷ (8 - 5