遞等式計算能簡算的要簡算,並寫出主要的簡算過程

2021-03-03 21:57:21 字數 3747 閱讀 9183

1樓:猴瞧杉

①1.8+3.84÷(15-12.6),

=1.8+3.84÷2.4,

=1.8+1.6,

=3.4;

②8×(1

18+58),

=8×1

18+8×58,

=49+5,=549;

③58÷[5×(56?3

4)],=58

÷[5×1

12],=58

÷512,=3

2;④0.4×80×2.5×0.125,

=(0.4×2.5)×(80×0.125),=1×10,

=10.

遞等式計算.(能簡算的要簡算,並寫出主要的簡算過程)①1.8+3.84÷(15-12.6) ② 8×( 1 18

2樓:喜洋洋

①1.8+3.84÷

(15-12.6),

=1.8+3.84÷2.4,

=1.8+1.6,

=3.4;

②8×(1

18+5 8

) ,=8×1

18+8×5 8

,=4 9

+5,=54 9

;③5 8

÷[5×(5 6

-3 4

)] ,

=5 8

÷[5×1

12] ,

=5 8

÷512

,=3 2

;④0.4×80×2.5×0.125,

=(0.4×2.5)×(80×0.125),=1×10,

=10.

脫式計算.(能簡算的要簡算,並寫出主要的簡便過程)(1)3.58-2.36-(2.64-1.42)(2)(14+16?13)×12

3樓:楷84修母

(1)3.58-2.36-(2.64-1.42)=3.58-2.36-2.64+1.42

=(3.58+1.42)-(2.36+2.64)=5-5

=0;(2)(14+1

6?13)×

12=1

4×12+1

6×12-1

3×12

=3+2-4

=1;(3)3.6×11

8+8.4÷8

11=3.6×11

8+8.4×11

8=(3.6+8.4)×11

8=12×11

8=332;

(4)3

4÷[3.75×(1.2?15)]

=34÷[3.75×1]=34

÷334=15.

計算下面各題,能簡算的要簡算,並寫出主要的簡算過程.(1)9.06-2.68-0.32(2)(3.06÷0.25+2.76)×0

4樓:褲兜最棒

(1)9.06-2.68-0.32,

=9.06-(2.68+0.32),

=9.06-3,

=6.06;

(2)(3.06÷0.25+2.76)×

0.2,

=(12.24+2.76)×0.2,

=15×0.2,

=3;(3)18-(3

5+4÷25),

=18-(0.6+4×52),

=18-(0.6+10),

=18-10.6,

=7.4;

(4)2.7×1.25+5.3×125%,=2.7×1.25+5.3×1.25,

=(2.7+5.3)×1.25,

=8×1.25,

=10.

用遞等式計算,能簡算的要寫出簡算過程. (2.5×6+2.5×4)÷5 35.6-2.8+4.4-7.2 0.25×3.2×12.

5樓:最強黑客

(1)(2.5×6+2.5×4)÷5,

=2.5×(6+4)÷5,

=2.5×10÷5,

=25÷5,

=5;(2)35.6-2.8+4.4-7.2,=(35.6+4.4)-(2.8+7.2),=40-10,

=30;

(3)0.25×3.2×12.5,

=0.25×4×0.8×12.5,

=(0.25×4)×(0.8×12.5),=1×10,

=10;

(4)7.5÷(1.5+2.5),

=7.5÷4,

=1.875;

(5)0.6×(5+0.6)-1,

=0.6×5+0.6×0.6-1,

=3+0.36-1,

=3.36-1,

=2.36;

(6)3.7×1.25-3.7×0.25,=3.7×(1.25-0.25),

=3.7×1,

=3.7.

脫式計算下面各題(能簡算的要用簡便方法計算,並寫出簡算過程). (84×27-2166)÷17 115×3.

6樓:小柒

①(84×27-2166)÷17,

=(2268-2166)÷17,

=102÷17,

=6;②11

5×3.7+5.3÷5

11+2.2,

=2.2×3.7+5.3×2.2+2.2,=2.2×(3.7+5.3+1),

=2.2×10,

=22;

③(0.75÷3-0.1)×(1-23),=(0.25-0.1)×13,

=0.15×13,

=0.05.

脫式計算(能簡便算的要簡算,寫出主要步驟)①3.6-2.8+7.4-7.2         ② 8 17 ÷

7樓:姿態

①3.6-2.8+7.4-7.2

=3.6+7.4-(2.8+7.2)

=11-10

=1;②8

17÷23+1

23 ×

9 17

+123 =8

17×1

23+1

23×9

17+1

23×1

=(8 17

+917

+1)×1

23=2×1

23 =2

23;③(1 2

+1 3

)÷3 5

-1718 =5

6÷3 5

-1718

=2518

-1718 =4

9;④18÷[5 6

+(5 8

-1 3

)]=18÷(5 6

+724

)=18÷27

24=16.

用遞等式計算寫出必要的計算過程,能簡便計算的要簡便計算(1)28×105+7236÷18(2)4.5-3.15+0.5×8(3

8樓:匿名使用者

(1)28×105+7236÷18

=2940+402

=3342

(2)4.5-3.15+0.5×8

=4.5-3.15+4

=5.35

(3)8.5×5.3+3.7×8.5+8.5=8.5×(

5.3+3.7+1)

=8.5×10

=85(4)(0.7+1.7)×15-36=2.4×15-36

=36-36=0

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