脫式計算(能簡算的要簡算)1

2021-03-19 18:38:00 字數 4120 閱讀 4637

1樓:你猜

(1)1.25×3.2×8

=1.25×8×3.2

=10×3.2

=32;

(2)0.45×6.2+3.8×0.45

=0.45×(6.2+3.8)

=0.45×10

=4.5;

(3)2.7×9.9

=2.7×(10-0.1)

=2.7×10-2.7×0.1

=27-0.27

=26.73;

(4)15×10.2

=15×(10+0.2)

=15×10+15×0.2

=150+3

=153;

(5)0.25×[(2.8+4.4)÷1.2]=0.25×[7.2÷1.2]

=0.25×6

=1.5;

(6)[32-(1.95-1.95)]÷1.6=[32-0]÷1.6

=32÷1.6

=20.

用遞等式計算,能簡算的要簡算.(18%)(1)25×12-850÷17(2)(3.2÷16+10.8)÷22(3)3.2×12.5×2

2樓:匿名使用者

(du1)25×zhi12-850÷

dao17

=25×4×3-50,

=300-50,

=250;

(2)(3.2÷16+10.8)÷22

=(0.2+10.8)÷22,

=11÷22,

=0.5;

(3)3.2×12.5×2.5

=0.8×4×12.5×2.5,

=(12.5×0.8)×(2.5×4),

=10×10,

=100;

(4)7.05-3.84-0.16-1.05=7.05-1.05-(3.84+0.16),=6-4,

=2;(5)8

17×9-8÷17 8

=817

×9-8×8

17,=(9-8)×8

17,=1×8

17,=8

17;(6)5 6

×[2÷(7 8

-3 4

)]=5 6

×[2÷1 8

],=5 6

×16,

=40 3.

脫式計算(能簡算要簡算)?

3樓:妙酒

3.76+4.25+5.75 +12-

3.27-0.73+ 60.

49-36+5.51,『=(4.25+5.

75)+12-(3.27+0.73)-36+(60.

49+5.51)+3.76

=10+12-4-36+66+3.76

=51.76

4樓:老任

解:1 . 3.76+4.25+5.75

=3.76+(4.25+5.75)

=3.76+10

=13.76

2. 12-3.27-0.73

=12-(3.27+0.73)

=12-4

=83. 60.49-36+5.51

=(60.49+5.51)-36

=66-36=30

5樓:原宇衛香旋

(54+9/13)÷9

36÷【

(5/6-1/3)×3】

5/7+8/7÷2

2-6/13÷9/2-2/3

=(54+9/13)×1/9

=36÷2/3

=5/7+4/7

=2-4/39-2/3

=54×1/9+9/13×1/9

=54=9/7

=2-(4/39+2/3)

=6+1/13

=48/39=16/13

=79/13或6

1/13

【3/5-(2/4-2/5)】÷4

=【3/5-1/10】÷4

=1/2÷4

=1/8

希望我答

幫助純手打辛苦~

脫式計算(能簡算的要簡算) ⑴1/4÷(2/3-3/2×1/3) ⑵24×(1/6+3/8+7/

6樓:昨夜星辰吉日

⑴1/4÷(2/3-3/2×1/3)

=1/4÷(2/3-1/2)=1/4÷(4/6-3/6)=1/4÷1/6=1/4x6=6/4=3/2;

⑵24×(1/6+3/8+7/12)=24x1/6+24x3/8+24x7/12=4+9+14=27;

⑶1/8×58+1/8×41+1/8=1/8x(58+41+1)=1/8x100=100/8=12.5.

7樓:

⑴1/4÷(2/3-3/2×1/3)=3/2

⑵24×(1/6+3/8+7/12)=27

⑶1/8×58+1/8×41+1/8=25/2

8樓:匿名使用者

(1)1/4÷(2/3一3/2×1/3)=1/4÷(4/6一3/6)=1/4×6/1=3/2

12.25-1.25x3.2十0.8脫式計算,能簡算的要簡算,怎麼算?

9樓:匿名使用者

通過觀察,能簡算的是:

1.25*3.2

=1.25*8*0.4

=10*0.4

=4所以,原式:

12.25-4+0.8

=8.25+0.75+0.05

=9+0.05

=9.05

請採納謝謝

10樓:匿名使用者

12.25-1.25×

dao3.2+0.8

=12.25-1.25×(

回0.8×4)

答+0.8

=12.25-(1.25×0.8)×4+0.8=12.25-1×4+0.8

=12.25-4+0.8

=8.25+0.8

=9.05

脫式計算能用簡便計算的要簡算.(1)310+4.25+3.7+134(2)0.125×3.2×25(3)17×44+54×17(4)7.8÷

11樓:手機使用者

(1)3

10+4.25+3.7+134=3

10+3.7+4.25+13

4=(3

10+3.7)+(4.25+134)

=4+6

=10;

(2)0.125×3.2×25

=0.125×8×0.4×25

=(0.125×8)×版(權0.4×25)=1×10

=10;

(3)1

7×44+54×17=1

7×(44+54)=17

×98=14;

(4)7.8÷〔32×(1-5

8)+3.6〕

=7.8÷〔32×3

8+3.6〕

=7.8÷〔12+3.6〕

=7.8÷15.6

=0.5;

(5)5

6÷〔3

4×(79-1

3)〕=56

÷〔34×49

〕=56÷1

3=2.5.

脫式計算(能簡算的要簡算

12樓:軒胤

(1)6.72-2.3÷0.5×0.8

=6.72-4.6×0.8

=6.72-3.68

=3.04;

(2)98-1

7+18-6

7=(98+1

8)-(17+6

7)=54

-1=14;

(3)9

10÷[1

2×(65-3

10)]

=910

÷[12

×910]=9

10÷9

20=2;

(4)(27+1

5)×7×5=27

×7×5+1

5×7×5

=10+7

=17.

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