×=
14-=,
÷=48,
×500=160,
+= 5
10-=,
4÷20=,
×200=700,
-=
÷15=,
×=,
4×=1,
+=2
×99=,
420÷35=12,
25×12=300,
135÷=270
3/4 + 1/4 =1,
2 + 4/9 =22/9,
3 - 2/3 =7/3,
3/4 - 1/2= 1/4
1/6 + 1/2 -1/6 =1/2,
-(+)=,
7/8 + 3/8 =5/4
3/10 +1/5 =1/2,
4/5 - 7/10 =1/10,
2 - 1/6 -1/3 =
÷17=,
+19=,
÷=4,
×=
×=,
1÷5=,
6÷12=,
-=
1.(1+1/2)(1+1/3)(1+1/4)......(1+1/100)
2.(1-1/2)(1-1/3)(1-1/4)......(1-1/100)
+2-8+2
*4/25*4
-(-)
+198
-202
+301
-99
+-+
-2456*21
-4*
×3/5
+++
-9036÷18
×+
*+*
×1/3
*45-328
×12
*+
×5/6
23.(50-)/
×1/3
*47+639
-1/6
*-
×1/5
*+*
×4/5
+++
-1/2
*+*
×1/5
-420/12
-*
+30/2+90/6
-1998.
-105*34
+*
41.(1/2+1/3+1/4)*
42.(25+4)*4
-4263/21
+
÷13×27
×-÷
×4 +×
48.(+ )×-768÷32
×80-÷
-768÷32
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