28 + 43 - 12 + 12
( 28 + 43 ) - ( 12 +12 )
71 - 24
47
đúng luôn
13+12 -12+34 -43=
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50=?
32+43-00+23-12=?
1+12+23+34+43+54=?
1--2-12-12-2-3-43--35--4353-4-5-3-5-3--35-3-5-2--22-4-23-53-5--3533553=?
12+28+72+88=?
Đặt tính rồi tính
35 + 12 60 + 38 6 + 43
41 + 34 22 + 40 54 + 2
12 + 23 = ?
28 + 83 = ?
20+7=
37+3=
12+9=
10+30=
90-70=
23+7=
10+8=
27-9=
45-10=
59-27=
81-10=
28+16=
29+12=
71-12-
