19992-2000×1998=______.
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/09 02:14:47
19992-2000×1998=______.
![19992-2000×1998=______.](/uploads/image/z/6624457-25-7.jpg?t=19992-2000%C3%971998%3D______%EF%BC%8E)
19992-1998×2000
=19992-(1999-1)(1999+1)
=19992-19992+1
=1.
故答案为:1.
=19992-(1999-1)(1999+1)
=19992-19992+1
=1.
故答案为:1.
19992-2000×1998=______.
125×(4+8)=______×______+______×______.
填质数:21=______+______=______×______=______-______.
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=______×______.
0.125=5:______=______%=______÷______.
根据1.2×4=0.6×8,可以写成比例______:______=______:______.
0.4:1.2=0.6:1.8可改写成______×______=______×______.
______升______毫升=4050毫升 6.25小时=______时______分.
从36的约数中选出4个数组成比例:______:______=______:______.