①53×72= ②832-4= ③248÷5= 验算:
17×35= 52×16= ※408÷6=
38×56 = ★332÷4 = ★268÷6 =
432÷8= 39×42= ☆564÷7=
49×21= 68×34= ☆36×25=
176÷8= 15×40= 300÷25=
①38×25=
②40×26=
③481÷8=
④△508÷7=
67×83=
464÷4=
*610÷9=
验算: