问题
解答题
用简便方法计算.
|
答案
(1)78500÷14,
=78500÷2÷7,
=39250÷7,
=5607.
4285. 1
;. 7
(2)900×14,
=900×(2×7),
=(900×2)×7,
=1800×7,
=12600.
用简便方法计算.
|
(1)78500÷14,
=78500÷2÷7,
=39250÷7,
=5607.
4285. 1
;. 7
(2)900×14,
=900×(2×7),
=(900×2)×7,
=1800×7,
=12600.