考点:整数的加法和减法
专题:运算顺序及法则
分析:把一个整数分成整千和整百、整十的数进行计算.
解答:
解:3949+2974
=3000+900+49+2000+900+74
=5000+1800+123
=6923
6226+3817
=6200+26+3800+17
=10000+43
=10043
9101-7515
=9000+100+1-7000-500-15
=(9000-7000-500)+(100+1-15)
=1500+86
=1586
9488+7163
=9400+88+7100+63
=16500+88+63
=16651
6474-1576
=6474-(1600-24)
=6474-1600+24
=4874+24
=4898
9134+7567
=9100+7500+34+67
=16600+101
=16701
8738+3654
=8700+3600+38+54
=12300+92
=12392
7062-2114
=7000+62-2000-100-14
=5000+(62-14)-100
=4900+48
=4948
6383-1357
=6300+83-1300-57
=5000+(83-57)
=5000+26
=5026
故答案为:6923,10043,1586,16651,4898,16701,12392,4948,5026.
点评:本题运用整千加上整千,整百和整百相加,几十与几十相加减的方法进行计算即可.