19971997+9971997+971997+71997+1997+997+97+7=______.
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/11 06:14:51
19971997+9971997+971997+71997+1997+997+97+7=______.
19971997+9971997+971997+71997+1997+997+97+7,
=(19972000-3)+(9972000-3)+(972000-3)+(72000-3)+(2000-3)+(1000-3)+(100-3)+(10-3),
=19972000+9972000+972000+72000+2000+1000+100+10-8×3,
=30991086;
故答案为:30991086.
=(19972000-3)+(9972000-3)+(972000-3)+(72000-3)+(2000-3)+(1000-3)+(100-3)+(10-3),
=19972000+9972000+972000+72000+2000+1000+100+10-8×3,
=30991086;
故答案为:30991086.
19971997+9971997+971997+71997+1997+997+97+7=______.
27046=2×______+7×______+4×______+6×______.
125×(4+8)=______×______+______×______.
填质数:21=______+______=______×______=______-______.
97+98+99+100+101+102+103=______×______=______.
在算式35÷5=7中,______是______的倍数,______是______的因数.
56÷7=8中,______是______的倍数,______是______的因数.
3.76°=______度 ______分 ______秒.
填上适当的质数.24=______+______=______+______=______+______.
巧填单位名称.1______-59______=1______;1______-9______=1______;1___
0.87×99+0.87=______×______.
因式分解:xy-7y=______.