题目
用简便方法计算下列各题: (1) ( )2016×(﹣1.25)2017 (2) (2 )10×(﹣ )10×( )11 . 答案:解:( 45 )2016×(﹣1.25)2017=[ 45 ×(﹣1.25)]2016×(﹣ 54 )=﹣ 54 ;
解:(2 25 )10×(﹣ 56 )10×( 12 )11=[2 25 ×(﹣ 56 )× 12 ]10× 12= 12 .Tom is good at playing _________ tennis.His sister is good at playing _________ guitar. A.the,the B.a,a C./,the D.the、/