3 算一算。
1+3= 5-2= 2+2=
3+0= 1+2= 3+1=
5-3= 2-2= 2-0=
3-1= 4-1= 0+4=
1+3= 5-2= 2+2=
3+0= 1+2= 3+1=
5-3= 2-2= 2-0=
3-1= 4-1= 0+4=
答案
1+3=4
5-2=3
2+2=4
3+0=3
1+2=3
3+1=4
5-3=2
2-2=0
2-0=2
3-1=2
4-1=3
0+4=4
5-2=3
2+2=4
3+0=3
1+2=3
3+1=4
5-3=2
2-2=0
2-0=2
3-1=2
4-1=3
0+4=4
1 在里填上合适的数。
$3 - □ = 0$
$5 + □ = 5$
$4 - □ = 1$
$0 + □ = 3$
$□ + □ = 4$
$□ - □ = 0$
$3 - □ = 0$
$5 + □ = 5$
$4 - □ = 1$
$0 + □ = 3$
$□ + □ = 4$
$□ - □ = 0$
答案
$3 - \boxed{3} = 0$
$5 + \boxed{0} = 5$
$4 - \boxed{3} = 1$
$0 + \boxed{3} = 3$
$\boxed{1} + \boxed{3} = 4$(答案不唯一)
$\boxed{2} - \boxed{2} = 0$(答案不唯一)
$5 + \boxed{0} = 5$
$4 - \boxed{3} = 1$
$0 + \boxed{3} = 3$
$\boxed{1} + \boxed{3} = 4$(答案不唯一)
$\boxed{2} - \boxed{2} = 0$(答案不唯一)
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