93x[35十(214-195)]
=93x[35十19]
=93x54
=90×54+3×54
=4860+162
=5022
簡便方法計算72x34 72x67-72
72x34 +72x67-72
=72×(34+67-1)
=72×100
=7200
用簡便方法計算16*34/16*66
解:
(16×34)/(16×66)
上下同除以16:
34/66
=17/33
答案是:
17/33
93x[35十(214-195)]
=93x[35十19]
=93x54
=90×54+3×54
=4860+162
=5022
72x34 +72x67-72
=72×(34+67-1)
=72×100
=7200
解:
(16×34)/(16×66)
上下同除以16:
34/66
=17/33
答案是:
17/33