+=
63=
2.95×1000＝
-=
+0.5=
1.25×0.8×0＝
2--=
6.12+2.88＝
-+=
310+510＝
23−39＝
3+13＝
12+13+16＝
3132−78＝
0.4+25＝
1−713＝
1−512−712＝
37 + 47 = 57 + 514 = 13 - 524 = 1- 512 =
16 - 18 = 2- 56 = 25 + 14 = 4.4+ 35 =
2 16 + 16 = 4-1 49 =
57−27=
1312−112=
13+12=
2+235=
17−18=
1−613=
13−19=
45+65=
