1樓:樂為人師
98+265+202 273-73-27
=(98+202)+265 =273-(73+27)
=300+265 =273-100
=565 =173
250×13×4 3200÷4÷25
=(250×4)×13 =3200÷(4×25)
=1000×13 =3200÷100
=13000 =32
88×125 99×38+38
=11×(8×125) =(99+1)×38
=11×1000 =100×38
=11000 =3800
17×23-23×7 72×125
=(17-7)×23 =9×(8×125)
=10×23 =9×1000
=230 =9000
用簡便方法計算下面各題(脫式計算)
2樓:童年笑語
125x4+125x8
=500+1000
=1500
3樓:閒來跟帖
125×(4+8)
=125x4+125x8
=500+1000
=1500
700÷(35×2)
=700÷70
=100
53×101-53
=53×(101-1)
=53×100
=5300
180÷5÷4
=180÷(4×5)
=180÷20
=970×8×5
=70×(8×5)
=70×40
=2800
2800<3000
答一星期(5天)不能完成3000張的印刷
4樓:文軒永遠愛你
125×4×3=1500
5樓:致命的殤
125乘4+125乘8
用簡便方法計算下列各題(要有過程,脫式計算)
6樓:匿名使用者
0.78×98
=0.78×(100-2)
=0.78×100-0.78×2
=78-1.56
=76.44
3.6×1.9+0.36×81
=3.6×1.9+3.6×8.1
=3.6×(1.9+8.1)
=3.6×10
=367.6×2.4+6.
5×7.6+7.6+0.
76=7.6×2.4+7.
6×6.5+7.6×1+7.
6×0.1=7.6×(2.
4+6.5+1+0.1)
=7.6×10=76
用簡便方法計算下面各題。要用脫式計算。
7樓:匿名使用者
144又25分之12÷12
=(144+12/25)×1/12
=144×1/12+12/25×1/12
=12+1/25
=12又1/25
(9又7分之2+7又9分之2)÷(7分之5+9分之5)=(9+2/7+7+2/9)÷(5/7+5/9)=[16+2×(1/7+1/9)]÷[5×(1/7+1/9)]=[16+2×16/63]÷[5×16/63]=16÷(5×16/63) +(2×16/63)÷(5×16/63)
=63/5+2/5
=65/5=13
8樓:星空夜雨落
佔給位置先
(144又12/25)/12
=(144+12/25)/12
=144/12+12/25/12
=12+1/25
=12又1/25
(9又2/7+7又2/9)/(5/7+5/9)=(9+2/7+7+2/9)/(5/7+5/9)=[16+2×(1/7+1/9)]/[5×(1/7+1/9)]=16/5/(1/7+1/9)+2/5
=16/5x63/16+2/5
=63/5+2/5
=65/5=13
9樓:匿名使用者
144又25分之12÷12 =(144+12/25)÷12 =144÷12 +(12/25)÷12 =12+1/25=12又25分之1
(9又7分之2+7又9分之2)÷(7分之5+9分之5)=(65/7+65/9)÷(5/7+5/9)
=65*(1/7+1/9)÷[5*(1/7+1/9)]=65÷5=13
數學題:怎樣用簡便方法計算下面各題(要過程 用脫式計算)
10樓:伏玉蓉聶念
(1):(4.8除以4)乘(0.25乘以4)(2)2.33乘以(0.5乘以4)
(3)1.5乘以100+1.5乘以5
(4)(1.2+0.8)乘以2.5
雖然不知道你幾年級,不過我已經預備了,方法是這樣,以前老師教的,希望幫得上忙
用簡便方法計算下面各題(脫式計算)。 (1)2十4十6+……十18+20 (2)20一19+17+
11樓:匿名使用者
1.用2+18 4+16 6+14 依次往下算 最後加20
12樓:火麒麟戰士樂園
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20
=(1+19)+(2+18)+(3+17)+(4+16)+(5+15)+(6+14)+(7+13)+(8+12)+(9+11)+10+20
=20×10+10
=210
脫式計算下面各題(能簡算的要用簡便方法計算,並寫出簡算過程). 450÷18×25+173. 670+65÷
13樓:匿名使用者
(1)450÷18×25+173,
=25×25+173,
=625+173,
=798;
(2)670+65÷3×35,
=670+65×(13×3
5),=670+65×15,
=670+13,
=683;
(3)58-1
6×45+57,=58
-215
+57,
=59120
+57,
=5759
120;
(4)38-12×6÷16,
=38-72÷16,
=38-4.5,
=33.5.
脫式計算:一、用簡便方法計算下面各題。⒈6/5×2/15×2/15×4/5 = = = =
14樓:樂為人師
6/5×2/15+2/15×4/5
=(6/5+4/5)×2/15
=2×2/15
=4/15
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