3,7,5,=1 3,7,5=2 3,7,5=3 3,7,5=4 顺序不变,只用符号。求解

2024-11-01 21:35:20
推荐回答(3个)
回答1:

1、3一7十5

=-4+5

=1

2、(3十7)÷5

=10÷5

=2

3、-√(-3+7)+5

=-√4+5

=-2+5

=3

4、3!-7+5

=3×2×1-7+5

=6-7+5

=-1+5

=4

5、3+7-5

=10-5

=5

回答2:

3-( 7 - 5)= 1
(3 十 7)÷ 5 = 2
-(3的 平方- 7)十5 = 3
-(3 × 7 )十5的平方 = 4
3 +7- 5 = 5
3 Ⅹ(7- 5 )= 6
3的平方-7+5 = 7
(3的平方一7的平方)÷(-5)=8
-3 +7 +5 = 9
(3的平方 -7) × 5 = 10

回答3:

解:(3!-7)x(-5^0)=1
(3+7)/5=2
3+7^0-5^0=3
3!-7+5=4