小学四年级数学口算题50道.doc

（一）13677 77819 923741 31981457 3720 21073 167654983947 1231 492581 27914211353 5054 6819 83897286 329633 270 899326661479 222143 4147 58686694 164 4271 20217（二）6220 4246 19268 128592802 996 6539 89165900 3533 37153 6956393552 199 1915 6141182178 1306 3605 7264306953 471622 19647 993531518084 2438 539313 204662（三）151268 2418 794627 41478441 3167 12656 32887129 975257 536 80545801 15989 437876 5958028 50105 743832 6827630 385 68202 01473406 494 4863 158（四）612036 8049 0632 4860802466 440 4816 1109567 2482 4010211873 288 2745781X255= 12598-25X35= 35X69-78=320X27-56= 24080X269= 73X56-145=（五）134+126= 230-136= 433+56= 877-121= 334+542= 149+220= 675-75= 81+203=163+251= 542-306= 74+424= 403-95= 90+910= 45+396= 273-72= 509-294= 688+31= 532-79= 84+311= 402+311= 85+143= 78X25-256= 708X250-921=338-168= 276-89= 94+380+526= 57+650= （六）5.36.3+2.3= 4.47.3+5.3= 48.8+1.5= 4.10.8-0.2= 9.91.4+0.6= 6.42.4+3.6= 12.48-49.7= 9.81.3-0.3= 4.89.1-0.5= 2.9+0.67.5= 4.21.8-0.1= 8.66.5+6.4= 5.59-34.3= 0.25.6+2.5= 3.053-0.15.3= 1.65-0.5= （七）9.48.4+5.8= 0.54.6+7.1= 6.908-1.31.6= 11.248-4.63.8= 13.596-9.15.6= 9.576-0.41.9= 11.259-2.17.9= 1.5-0.85= 7.3+3.82.3= 1.89.6-1.7= 9.3+6.14.8= 7.55.7+5.8= 8.70.1-0.1= 8.999-1.74.7= （八）8.68.9+8= 1.7+0.37.6= 4.584-2.10.4= 9.84.3+9.6= 7.79.9+7.7= 8.7+3.49= 0.3+2.83.5= 51.1-0.2= 2.98.2+9.2= 3.91.7+0.5= 0.739-1.14.9= 0.30.9-0.1= 9.2+93.9= 8.8+0.60.1=