1、四年级数学(脱式计算和三位数乘以两位数计算)脱式计算2800 100789 (947599)7664 36(91327623) (932521)9 5071363498723(521504)25 3841223371 (3921)(3966) 571256035 848640161215003245 192(5438)67 138254 (13125)(38) (12+24+80)5070425-509 2532125 32(25+125) 178101178 8436+64847599+275 83102832 98199 123181233+85123 50(344)325(24+16)
2、17899+178 7942+79+7957 7300254 8100475 7527+192 5 31870+13310 4(2565+2528) 138254 (13125)(38) (12+24+80)50 2532125 32(25+125) 10276 5898 178101178 8436+6484 7599+275 83102832 98199 123181233+85123 50(344)3 25(24+16) 17899+178 7942+79+7957 7300254 8100475 280840245 85(95144024) 58870(105202) 80400(43
3、0087015)14372727563 81432(135278) 125(331) 37.4(8.67.246.6) 156107-772937.85-(7.85+6.4) 1554(72-58)3 360(126)5 5006-(502-80) (10512635)25(453816)24 500(240386) 64(8742) 15 (845153)16 12(4928)7(58+37)(64-95) 178-14556+42 812-700(9+3111) (58+37)(64-95) 388+(5000-1000)158+262+138 375+219+381+225 500124
4、71021232 (181+2564)+2719 (13125)(38)(12+24+80)50 178101178 8436+6484 50(344)3 25(24+16)7599+275 83102832 17899+178 7942+79+7957 7300254 1225 7524 138254 (13125)(38) (12+24+80)50 2532125 32(25+125) 88125 10276 178101178 8436+64847599+275 83102832 123181233+85123 50(344)3 25(24+16)17899+178 7942+79+79
5、57 2356(1356721) 7527+1925 31870+133101235(17801665) 4(2565+2528) 120-14418+35 95(64-45) (58+37)(64-95)347+452-416052 120-36418+35 (58+37)(64-95) 330(6550) 1286816 64(126513) 7505 30+98-415 85-48+26 636-3665280(56-16) (75+25)(19-8) 480(65) 630-(188+122) 800-8002020 13+248 672-36+64 324-68+32 100-36+
6、64 548 413 = 三位数乘以两位数计算94 822 = 57 644= 922 67 = 26 269 = 41 549 = 57 563 = 766 79 = 62 666 = 21 581 = 653 57 = 665 84 = 545 67 = 37 484 = 844 98 = 694 24 = 98 155 = 12 122 = 369 75 = 68 752 = 454 30 = 100 554 = 700 51 = 944 800 = 845 80 = 512 200 = 645 300 = 2 600 = 300 119 = 242 400 = 411 50 = 324 20 = 600 155 755 600 = 445 90 = 20 112 = 60 322 = 94 300 = 212 100 = 90 236 =