239+153+47-239怎么简便
239+153+47-239怎么简便
239+153+47-239
=239-239+153+47
=0+200
=200
用简便方法计算239+152+47-239
用简便方法计算239+152+47-239
=239-239+152+47
=152+48-1
=199
简便计算,354×239 645×239 239
原式
=354x239+645x239+239
=(354+645+1)x239
=(999+1)x239
=1000x239
=239000
供参考。
239×23+32×239+45×239的简便计算脱式
239×23+32×239+45×239
=239x(23+32+45)
=2398x100
=23900
希望能帮到你!
239×54+239×45+239如何简便运算
分析:逆用乘法分配律,就可以了:
239×54+239×45+239
=239×(54+45+1)
=239×100
=23900
239+450/(72-27)简便运算
239+450/(72-27)
= 239+450/45
= 239+10
= 249
239+195怎么简便计算
239+195
=(240-1)+(200-5)
=(240+200)-(1+5)
=440-6
=434
239X99+239的简便运算
239X99+239的简便运算
=239x(99+1)
=239x100
=23900
239+450用简便方法怎么算
239+450
=250+450-11
=700-11
=689
239—136十36用简便方法怎么算?
239—136十36
=239—(136-36)
=239-100
=139
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