问题
填空题
计算: (1)
(3)
|
答案
(1)
×7
=7
=7;7×7
(2)
×(-2
)=-3
=-2×3
;6
(3)
=2000
=400×5
×400
=205
;5
(4)
=(-16)×9×(-81)
=16×9×81
×16
×9
=4×3×9=108.81
计算: (1)
(3)
|
(1)
×7
=7
=7;7×7
(2)
×(-2
)=-3
=-2×3
;6
(3)
=2000
=400×5
×400
=205
;5
(4)
=(-16)×9×(-81)
=16×9×81
×16
×9
=4×3×9=108.81