早教吧作业答案频道 -->其他-->
用简便方法计算下面各题.①574-399②432-(154-68)③672+516-72④78+76+83+82+77+80+79+85⑤321+(729-155)⑥725÷25.
题目详情
用简便方法计算下面各题. ①574-399 | ②432-(154-68) | ③672+516-72 |
④78+76+83+82+77+80+79+85 | ⑤321+(729-155) | ⑥725÷25. |
用简便方法计算下面各题. ①574-399 | ②432-(154-68) | ③672+516-72 |
④78+76+83+82+77+80+79+85 | ⑤321+(729-155) | ⑥725÷25. |
①574-399
②432-(154-68)
③672+516-72
①574-399
②432-(154-68)
③672+516-72
▼优质解答
答案和解析
(1)574-399,
=574-400+1,
=175;
(2)432-(154-68),
=432+68-154,
=500-154,
=346;
(3)672+516-72,
=672-72+516,
=600+516,
=1116;
(4)78+76+83+82+77+80+79+85,
=80×8-2-4+3+2-3+0-1+5,
=640;
(5)321+(729-155),
=321+729-155,
=1050-155,
=895;
(6)725÷25,
=725÷5÷5,
=145÷5,
=29.
=574-400+1,
=175;
(2)432-(154-68),
=432+68-154,
=500-154,
=346;
(3)672+516-72,
=672-72+516,
=600+516,
=1116;
(4)78+76+83+82+77+80+79+85,
=80×8-2-4+3+2-3+0-1+5,
=640;
(5)321+(729-155),
=321+729-155,
=1050-155,
=895;
(6)725÷25,
=725÷5÷5,
=145÷5,
=29.
看了 用简便方法计算下面各题.①5...的网友还看了以下:
已知0..5=59,0.0.5=590,0..15=15990.0..15=15990,0..7= 2020-04-07 …
递等式计算.(1)7000÷25-28×6(2)(289-179)÷(275÷25)(3)18+3 2020-04-07 …
直接写出得数(后四题估算).38+38×7=2-79=1÷18+18÷1=34÷0.75=0×45 2020-04-07 …
计算:32×30=10×50=4500÷9=3.41-0.3=0÷30+4=10-0.2=5+24 2020-04-07 …
简便方法计算:(1/10+1/18+1/30)×45/7还有:3833/4×7.9+79×615/ 2020-05-15 …
计算下面各题,能简便计算的要用简便方法算.0.4÷(0.3×2-0.4)23×511+611÷32 2020-05-15 …
(2010•吉安县)神机妙算细又巧!①711×89+711÷910②1375+450÷18×25③ 2020-05-17 …
4/5+14/5x4/76÷2/3+2/3÷635又7/11÷79/11÷8-5/11x1/82/ 2020-05-17 …
九宫格解法@@8@@@@@2@@@@@2@@5@39@1@@@@@@6@@35@@@7@@@@@6 2020-06-10 …
神机妙算细又巧!①711×89+711÷910②1375+450÷18×25③4×0.8×2.5× 2020-07-10 …