脫式計算(能簡算的要簡算)(1)

2021-03-17 01:39:46 字數 2463 閱讀 6663

1樓:手機使用者

(1)12.75-5

17+11

4-1217,

=(12.75+11

4)-(5

17+12

17),

=14-1,

=13;

(2)[1-(1

5+0.3)]÷18,

=[1-0.5]÷18,

=0.5÷18,

=4;(3)2

9×40%+79÷5

2,=(29+79

)×40%,

=1×40%,

=0.4;

(4)1.25×3.2×2.5,

=(1.25×8)×(0.4×2.5),

=10×1,

=10.

脫式計算(能簡算要簡算)?

2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

3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

4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) 0.125×0.25×8×4 [5-1.7÷(2-1)]×1 87×386 49÷(79+49)×114

5樓:手機使用者

(1)0.125×

源0.25×8×4,

=(0.125×8)×(0.25×4),

=1×1,

=1;(2)[5-1.7÷(2-1)]×1,=[5-1.7÷1]×1,

=[5-1.7]×1,

=3.3×1,

=3.3;

(3)87×386,

=(86+1)×386,

=86×3

86+1×386,

=3+386,

=3386

;(4)4

9÷(79+4

9)×114,

=49÷119

×114,=4

11×114,

=1;(5)3.9÷1.5-2.3×0.5,=2.6-1.15,

=1.45;

(6)112÷3

4-58×1635,

=2-27,

=157.

脫式計算.(能簡算的要簡算)①1÷0.25+0.25÷1-2.5×0.1②1+2+3+4+5+6+5+4+3+2+16666662③22×4+24×6+

6樓:度鍍

①1÷0.25+0.25÷1-2.5×0.1,=4+0.25-0.25,

=4+(0.25-0.25),

=4+0,

=4;②1+2+3+4+5+6+5+4+3+2+16666662

,=36

6666662

,=18×2

3333331×2

,=18

3333331;③2

2×4+2

4×6+2

6×8+2

8×10

+210×12,=1

2-14+1

4-16+1

6-18+1

8-110+1

10-112,

=12-112,=5

12;④1÷(1-0.99)-99÷(1-0.999),=1÷0.01-99÷0.001,

=100-99000,

=-98900.

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