脫式計算,能簡算的要簡算10 1 0 25)0 01(

2023-02-06 13:45:28 字數 1078 閱讀 3979

1樓:芝芝冒油的麻麻

(10-1÷0.25)÷0.01

=(10-1÷1/4)÷1/100

=(10-1×4)×100

=96×100

=9600

(5/7+2/7÷2/3)×2/7

=(5/7+2/7×3/2)×2/7

=(5/7+3/7)×2/7

=8/7×2/7

=16/49

7/11÷17/5+4/11×5/17

=7/11×5/17+4/11×5/17

=5/17×(7/11+4/11)

=5/17

4/5-x=1/3

兩邊乘以15:

12-15x=5

x=(12-5)/15

x=7/15

x+x/5=120

兩邊乘以5:

5x+x=600

6x=600

x=100

2樓:匿名使用者

( 10 - 1 ÷ 0.25 ) ÷ 0.01= ( 10 - 1 × 4 ) × 100= 6 × 100

= 600

(5/7+2/7÷2/3)×2/7

= ( 5/7 + 2/7 × 3/2 ) × 2/7= ( 5/7 + 3/7 ) × 2/7= 8/7 × 2/7

= 16/49

7/11÷17/5+4/11×5/17

= 7/11 × 5/17 + 4/11 × 5/17= ( 7/11 + 4/11 ) × 5/17= 1 × 5/17

= 8/17

解方程 4/5-x=1/3

4/5 - x = 1/3

4/5 - 1/3 = x

(4/5 - 1/3 ) × 15 = 15x4/5 ×15 - 1/3 × 15 = 15x12 - 5 = 15x

7 = 15x

7/15 = x

x+x/5=120

( x + x/5 ) × 5 = 120 × 55x + x = 600

6 x = 600

x = 600 ÷ 6

x = 100

脫式計算,能簡算的要簡算,脫式計算(能簡算要簡算)?

1.3.8 3.91 復 22 19.7 3.8 3.91 2.3 3.8 1.7 5.5 68 0.5x 7.5 0.7 68 0.5x6.8 68 0.5 6.8 68 6.8 0.5 20352 162 36x24 352 4.5x24 352 108 244 六分之 制五 十四分之五 七分之...

計算。(能簡算的要簡算)脫式計算 能簡算的要簡算

1 3.6 8 17 17分之3乘3 3.6 8 17 9 17 3.6 17 17 3.6 1 2.6 2 3又11分之3 1又4分之3 3又11分之3 36 11 7 4 36 11 36 11 4 7 11 36 4 7 3 125 125 8 8 0 1 8 8 0 4 8又5分之4乘8又9...

脫式計算,能簡算的要簡算

du1 240 15 4,zhi 240 15 dao4 回 240 60,4 2 129 318 71,129 71 318,200 318,518 3 304 278,300 4 300 22 300 300 22 4 600 18,582 4 25 17 8 25 8 17,25 4 2 17...