北师大版四年级上册数学计算题专项训练(二)

1、北师大版四年级上册数学计算题专项训练、竖式：三位数乘两位数135x45108x2554 31247 x 210138x54126 x 89203 x 32312 25437 2882 x 403208 x 2436 x 137406 x 23460 23305 56624 7846 589353 5645 240479 x 85二、竖式:336+21三位数除以两位数、858 + 39验算918 + 27888+ 37645 + 32432 + 46966+23731 +79980 + 28828+ 36689 + 34618+889372+45294 + 29328 + 42395+ 5676

2、5 + 74840+ 35630+31961 +19三、简便计算1.加法交换结合律:48+ 25+ 175125 +75 + 320128 89 72 3153 38 16257+ 288+ 143378 +527+73167 289 3358 39 42 61158+395+105822 197 7875 34 125 366578 143 22 57129 235 171165163 32 137 2682.乘法交换结合律（一）25x 125x 32(15x25)x 438x 25x435x 2x5(60x25) x 4(125x5) x 80025x 17x4(25x 125) x (

3、8x4)38x 125x 8x 35x 289x 2125 5 8 29 8 12543 x 25x4125x50x 242x 125x 860 25 4125 5 825 x 17x437x 8x 1253 .乘法交换结合律（二）125 3224 125125x56125 72125x 1648x 125125 x6425 3625 3225 1625 2425 284 .乘法分配律（一）34x 72+34x287x48 + 7x5235x 37+65x 3785 82+82 1525x 97+25 x376x25+25x 2416x 17+ 16x2327 x 36 +27 x 6473x

4、 36+36x 2764 x 23+36x2343x 36+57x 3619x 67+ 19x 3357x 35+43x 3518x72+72x18246x 46+46x 5431 x 69+31 x 3134x 13-34x 35.乘法分配律（二）38x 99+3875x299+ 75102x 99+ 10239+ 9x 3999 x 128+ 12827 + 99x 2734+ 199x 3435 x 99+356.乘法分配律（三）125x （ 8 + 80 ）(80 + 4) x 258x ( 125+9)(20+4) x 2532 x ( 200+ 3)(125+ 17) x 80(1

5、00 + 2)x 99102 x ( 1001)25 x (40+4)(25+ 100) x 499 x ( 100+ 1)(125+40) x 8(125+25) x 899 x ( 100 + 7)8x (125+7)(30 + 25) x47.乘法分配律(四)46 x 10248x10199x46102x42103x 31107 16108x 15125x880088 102102 9939 10125 4148 101201 24302 43102 138.商不变的规律:300+254000+125240 + 5600 + 253200+50400 + 25150+25800 + 25

6、2000 + 1259000+125四、混合运算672-672 + 12x 7987 + ( 345298)65210 x 520+ (240 227)340240+ 20x 530x (320 170) + 90458 (85+28) + 23630x 840 + (240212)408 + 512 (178+283)864 + (27 23) x 12(105 x 12635)+25240140+5x3360260+ 20x 5104x48+272-1635+65-5- 20240+180+30x2450+30+20x 3146(34+420+70)624 + (27 14)x4(77 21 + 7)x 691(165 65 + 5)x5840+ (120+ 195)+ 15557-(186+26)-23375+ (25 10) x 1515x 27-200+8(324-285) x 12 +26(160 48+ 12) x 4336+ (3629) x 662