1.06×7=
8.6÷4=
1.5×0.4=
7.2÷1.2=
4.8×2.5=
0.84÷2.8=
6.2a-3.8a=
①(8.3-3.26) ÷3.6×7.5
②4.19×3.6+7.4×4.19-4.19
③12.5×0.17×0.8×4
④1.35× (12.9-28.5÷3.8)
A( 1,2 ) B( 2,4 ) C ( 7, 4 ) D ( 6,2 )