脫式計算能簡算的要簡算,脫式計算能簡算的要簡算

2021-05-11 14:07:45 字數 2483 閱讀 4902

1樓:猴鉸戎

(1)3.4÷[(1.2+0.5)×5],=3.4÷[1.2×5+0.5×5],

=3.4÷[6+2.5],

=3.4÷8.5,

=0.4;

(2)1.9+19.9+199.

9+0.3,=1.9+19.

9+199.9+(0.1+0.

1+0.1),=(1.9+0.

1)+(19.9+0.1)+(199.

9+0.1),=2+20+200,

=222.

脫式計算(能簡算的要簡算) 3.4÷[(1.2+0.5)×5] 1.9+19.9

2樓:米色長裙

(1)3.4÷[(1.2+0.5)×5],=3.4÷[1.2×5+0.5×5],

=3.4÷[6+2.5],

=3.4÷8.5,

=0.4;

(2)1.9+19.9+199.

9+0.3,=1.9+19.

9+199.9+(0.1+0.

1+0.1),=(1.9+0.

1)+(19.9+0.1)+(199.

9+0.1),=2+20+200,

=222.

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,(能簡便的要簡便)3.82÷0.2-0.2×2.5,2.4×1.58+6.6×1.58+1.58,0.48×6.5+5.2×0.65

6樓:匿名使用者

3.82÷0.2-0.2×2.5

=38.2÷2-0.5=19.

1-0.5=18.62.

4×1.58+6.6×1.

58+1.58

=1.58x(2.4+6.

6+1)=1.58x10=15.80.

48×6.5+5.2×0.

65=4.8×0.65+5.

2×0.65

=(4.8+5.2)×0.

65=10×0.65=6.512.

4-12.4×0.25=12.

4×(1-0.25)=12.4×3/4=3.

1×3=9.3七分之五-(七分之五-二分之一)=5/7-5/7+1/2=1/20.125×9+1÷8

=9x1/8+1x1/8=(9+1)x1/8=5/4

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