阅读下列计算过程:99×99+199=992+2×99+1=(99+1)2=1002=104(1)计算:999×999+1999=______=______=______=______;9999×9999+19999=______=______=______=______(2)猜想9999999-数学
题文
阅读下列计算过程:99×99+199=992+2×99+1=(99+1)2=1002=104 (1)计算: 999×999+1999=______=______=______=______; 9999×9999+19999=______=______=______=______ (2)猜想9999999999×9999999999+19999999999等于多少?写出计算过程. |