計算下列各題(脫式計算)簡便計算

2022-09-06 03:20:02 字數 3859 閱讀 8274

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

用簡便方法計算下列各題要有過程,脫式計算

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