脫式計算1 4乘以七又5 7加上0 25 3又

2021-03-17 01:39:45 字數 3530 閱讀 1669

1樓:匿名使用者

1/4x(7+5/7)+0.25x(3+2/7)+1/4=1/4x(7+5/7+3+2/7+1)

=1/4x12=3

2樓:匿名使用者

解18-1.8x=7.2

脫式計算(3/4+1/6)*2/3 25*1/5-5*1/5 6/11*7/15*10 (1/7+1/4)*28 (21+2/5)*5/7 39*7/13*2/3

3樓:匿名使用者

(3/4+1/6)*2/3 =(9/12+2/12)x2/3=11/18

25*1/5-5*1/5 =5-1=4

6/11*7/15*10 =60/15x7/11=28/11(1/7+1/4)*28 =4+7=11

(21+2/5)*5/7 =15+2/7

39*7/13*2/3=14

60*2/5=12x2=24

4*2/9=8/9

3/10*2/3+1/4=1/5+1/4=9/2020*2/5-5/8 =8-5/8=6+3/82/9*8+2/9=2 /9x(8+1)=25/7*1/5*49 =1/7

48*1/12*5/6 =20/6=10/3

脫式計算能簡算的要簡算(1)7分之12-(7分之5+0.5)(2)[1-(0.25+8分之3)]除以4分之1

4樓:學馥刁豐

(1)12/7

-(5/7+0.5)

=(12/7-5/7)-0.5

=1-0.5

=0.5

(2)[1-(0.25+3/8)]÷1/4=[1-(2/8+3/8)]÷1/4

=(1-5/8)÷1/4

=3/8÷1/4

=3/2

(3)(0.875+1/4)(1/8-1/72)=(7/8+2/8)(9/72-1/72)=9/8

×抄8/72

=1/8

(3)(7/5-2/5)÷4/5÷(3/7+3/2×4/9)=1÷4/5÷(3/7+2/3)

=5/4÷(9/21+14/21)

=5/4÷23/21

=105/92=1又

13/92

(你題目有可能打錯了)

解方程(1)

2x+0.4x=7.2

2.4x=7.2

x=7.2÷2.4

x=3(2)

5-2/3x=1/3

2/3x=5-1/3

2/3x=14/3

x=14/3÷2/3

x=7(3)

0.8+1/2x=0.9

1/2x=0.9-0.8

1/2x=0.1

x=0.2

(4)5x-3×7/10=7/5

5x=21/10+14/10

5x=35/10

x=7/10

以後自己做,這麼小不自己算,你長大後會算什麼?

5樓:瑞彭魄卿邃

(1)12/7

-(5/7+0.5)

=(12/7-5/7)-0.5

=1-0.5

=0.5

(2)[1-(0.25+3/8)]÷

zhi1/4

=[1-(2/8+3/8)]÷1/4

=(1-5/8)÷1/4

=3/8÷1/4

=3/2

(3)(0.875+1/4)(1/8-1/72)=(7/8+2/8)(9/72-1/72)=9/8

×8/72

=1/8

(3)(7/5-2/5)÷4/5÷(3/7+3/2×4/9)=1÷4/5÷(3/7+2/3)

=5/4÷(9/21+14/21)

=5/4÷23/21

=105/92=1又

13/92

(你dao

題目有可

版能打錯了)權

解方程(1)

2x+0.4x=7.2

2.4x=7.2

x=7.2÷2.4

x=3(2)

5-2/3x=1/3

2/3x=5-1/3

2/3x=14/3

x=14/3÷2/3

x=7(3)

0.8+1/2x=0.9

1/2x=0.9-0.8

1/2x=0.1

x=0.2

(4)5x-3×7/10=7/5

5x=21/10+14/10

5x=35/10

x=7/10

4/7+1/5-3/7+5/13=? 脫式計算:4/7+1/5-3/7+4/5=? 5.2-11÷7-1/7×2=? 3/4×4÷4×3/4=?和

6樓:匿名使用者

4/7+1/5-3/7+4/5=(4/7-3/7)+(1/5+4/5)=1/7+1=8/7

5.2-11÷7-1/7×

2=26/5-11/7-2/7=26/5-(11/7+2/7)=26/5-13/7=117/35

3/4×4÷4×3/4=(3/4×4)÷(4×3/4)=3÷3=1

脫式計算:7.9×1又1/4+4.1÷4/5 5/8×(2/5+1/3)÷2/3 (1/5+4/5×1/8)÷1/5

7樓:小辣

7.9×1又1/4+4.1÷

4/5=7.9×1又1/4+4.1×5/4

=5/4×(7.9+4.1)

=5/4×12

=155/8×(2/5+1/3)÷2/3

=5/8×2/5×3/2+5/8×1/3×3/2=3/8+5/16

=11/16

(1/5+4/5×1/8)÷1/5

=1/5×5+4/5×18×5

=1+72=73

5/7+4又4/5+2/7+5.2脫式計算,要過程

8樓:葉聲紐

5/7+4又4/5+2/7+5.2脫式計算5/7+4又4/5+2/7+5.2

=(5/7)+(2/7)+4.8+5.2

=1+10

=11.

9樓:八戒你胖咯

5/7+4又4/5+2/7+5.2

=(5/7+2/7)+(4.8+5.2)

=1+10=11

10樓:匿名使用者

5/7+2/7+4.8+5.2

1+1011

遞等式計算 3/4-(2/5+3/10) 5/7+1/4-9/14 3/4+3/6-5/8 5/9

11樓:阿凡達教

4/3—(2/5+3/1o丿=4o/3o一{i2/30+9/3o)=4o/30_21/3o=丨9/30先通分再計算

脫式計算4/5×2/7+1/7÷3/4

12樓:樂為人師

=8/35+4/21

=44/105

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