摘要:计算:9+99+999+9999+99999+6=( ).
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26、阅读下列计算过程:99×99+199=992+2×99+1=(99+1)2=1002=104
(1)仿照上面的计算过程按步填空:
999×999+1999=
9999×9999+19999=
(2)猜想9999999999×9999999999+19999999999等于多少?要求写出计算过程.
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(1)仿照上面的计算过程按步填空:
999×999+1999=
9992+2×999+1
=(999+1)2
=10002
=106
;9999×9999+19999=
99992+2×9999+1
=(9999+1)2
=100002
=108
.(2)猜想9999999999×9999999999+19999999999等于多少?要求写出计算过程.
25、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.
查看习题详情和答案>>
(1)计算:
999×999+1999=
9992+2×999+1=
=(999+1)2
=10002
=106
;9999×9999+19999=
99992+2×9999+1
=(9999+1)2
=100002
=108
(2)猜想9999999999×9999999999+19999999999等于多少?写出计算过程.
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.
查看习题详情和答案>>
(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.