问题
填空题
若m、n满足 ︳m－2 ︳+ (n+3)2=0，则nm=
答案
9
根据非负数的性质可求出m、n的值，再将它们代入nm中求解即可．
解：∵m、n满足|m-2|+（n+3）2=0，∴m-2=0，m=2；n+3=0，n=-3；则nm=（-3）2=9．
考查了非负数的性质：有限个非负数的和为零，那么每一个加数也必为零．
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若m、n满足 ︳m－2 ︳+ (n+3)2=0，则nm=
9
根据非负数的性质可求出m、n的值，再将它们代入nm中求解即可．
解：∵m、n满足|m-2|+（n+3）2=0，∴m-2=0，m=2；n+3=0，n=-3；则nm=（-3）2=9．
考查了非负数的性质：有限个非负数的和为零，那么每一个加数也必为零．
| 从方框中选择合适的选项完成对话。 | |
| A: It’s hot today! B: 1 A: Really? What shall we do? . B: Let’s go swimming. 2 A: 3 But how can we get to the pool? B: That’s easy, We can ride a bike to go there, A: We don't have bikes, you know, B: Mr Wang has one. A. 4 B: 5 He-is a warm-hearted teacher.I'm sure he'll lend it to us. A: Well, let's go and visit him. B: OK. | |
1. _______2. _______3. _______4. _______5. _______ |