题目内容
15-9-2=
[ ]
3.6×2.4= 9.6×2.3= 10.7×0.52=
0.48×0.025= 5.24×0.15= 2.05×0.016=
口算
(1)12
8+4= 12-4= 14-7=
(2)16+8= 12-7= 13-4=
18-7= 17-8= 9+8=
A.1
B.2
C.3
D.4