2.37*6.3/2.37*3.7 简便计算 2.5*1.25*0.32 3.8*10.1 2.4*0.8-4.48/2.8 2.6/【8.06/2-3.13】*1.4
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/26 09:39:37
2.37*6.3/2.37*3.7 简便计算 2.5*1.25*0.32 3.8*10.1 2.4*0.8-4.48/2.8 2.6/【8.06/2-3.13】*1.4
2.37*6.3/2.37*3.7 简便计算 2.5*1.25*0.32 3.8*10.1 2.4*0.8-4.48/2.8 2.6/【8.06/2-3.13】*1.4
2.37*6.3/2.37*3.7 简便计算 2.5*1.25*0.32 3.8*10.1 2.4*0.8-4.48/2.8 2.6/【8.06/2-3.13】*1.4
2.37*6.3/2.37*3.7
=(6.3/3.7)*(2.37/2.37)
=6.3/3.7
=63/37
2.5*1.25*0.32
=2.5*1.25*0.4*0.8
=2.5*0.4*(1.25*0.8)
=1*1
=1
3.8*10.1
=3.8*(10+0.1)
=3.8*10+3.8*0.1
=38+0.38
=38.38
2.4*0.8-4.48/2.8
=2.4*0.8-1.6
=(2+0.4)*0.8-1.6
=2*0.8+0.4*0.8-1.6
=1.6+0.32-1.6
=1.6-1.6+0.32
=0.32
2.6/【8.06/2-3.13】*1.4
=2.6/(4.03-3.13)*1.4
=2.6/0.9*1.4
=1.3/0.9*0.7
=130/63
2.5*1.25*0.32
=2.5*1.25*0.4*0.8
=(2.5*0.4)*(1.25*0.8)
=1*1
=1
3.8*10.1
=3.8*(10+0.1)
=3.8*10+3.8*0.1
=38.38
2.4*0.8-4.48/2.8
2.6/【8.06/2-3.13】*1.4
这是两道题?
2.5*1.25*0.32 =1(全部化成分数)
我来补充.
注:计算机所能识别的表达 式只许用 ( ) ,且只能写成一行.
1。 2.37*6.3/2.37*3.7 => ( 2.37*6.3*3.7)/2.37 = 6.3*3.7
2.。 4*0.8-4.48/2.8 => 4*0.8 -(4.48/2.8)
3. 2.6/【8.06/2-3.13】*1.4 => ...
全部展开
我来补充.
注:计算机所能识别的表达 式只许用 ( ) ,且只能写成一行.
1。 2.37*6.3/2.37*3.7 => ( 2.37*6.3*3.7)/2.37 = 6.3*3.7
2.。 4*0.8-4.48/2.8 => 4*0.8 -(4.48/2.8)
3. 2.6/【8.06/2-3.13】*1.4 => 2.6*1.4/((8.06/2)- 3.13)
要注意 ()在分子,分母,函数,指数上的正确用法。
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