㈠ 25×392的簡便運算有幾種
簡便計算過程方法一:
解:25×392
=25x(400-8)
=25x400-25x8
=10000-200
=9800
簡便計算過程方法二:
解:25×392
=25x4x98
=100x98
=9800
㈡ 25x398簡便運算怎麼方便簡便
398x25
=(400-2)x25
=400x25-2x25
=10000-50
=9950
㈢ 25×32的兩種簡便方法
先用二二十五乘先用25×4=100,然後再用,100×8=800,所以25×32=25×4×8=800
㈣ 175×398-25×398-100×102簡便運算
簡便計算
175×398-25×398-100×102
=(175-25)x398-10200
=150x(400-2)-10200
=150x400-150x2-10200
=60000-300-10200
=60000-(300+10200)
=60000-10500
=49500
㈤ 25乘398用簡便方法計算
=25×(400-2)
=25×400-25×2
=10000-50
=9950
格式要這樣寫
㈥ 簡便運算:25×398
25×398
=25×(400-2)
=25×400-25×2
=10000-50
=9950
㈦ 25乘以398用簡便方法怎麼算
25*400-25*2=9950
㈧ 398x25用簡便方法怎麼做
398x25
=(400-2)x25
=400x25-2x25
=10000-50
=9950
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㈨ 25x398請問怎樣簡便計算
398÷4=99.5
25x398
=25x4x99.5
=100x99.5
=9950
或者:
25x398
=25x(400-2)
=25x400-25x2
=10000-50
=9950
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㈩ 25乘398的簡便計算
25×(400-2)=25×400-25×2=10000-50=9950