用遞等式計算(能簡算的要簡算) 0 366 1 4 6)0 8 92 4 12 4 50

2021-05-13 02:13:28 字數 1973 閱讀 7123

1樓:龍軍

(1)0.36÷[(6.1-4.6)×0.8]=0.36÷[1.5×0.8]

=0.36÷1.2

=0.3;

(2)92.4-12.4×5

=92.4-62

=30.4;

(3)0.75÷0.25÷4

=0.75÷(0.25×4)

=0.75÷1

=0.75;

(4)8.4×6.42-3.4×6.42

=6.42×(8.4-3.4)

=6.42×5

=32.1.

脫式計算(能簡算的要簡算

2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.

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.

3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.

用遞等式進行計算,能簡便的要簡便簡便計算.7.29×4.6+46×1.271(28.7-18.6÷3.1)×0.816-5.32-4.6840

4樓:尼古丁

(1)7.29×4.6+46×1.271,=7.29×4.6+4.6×12.71,

=(7.29+12.71)×4.6,

=20×4.6,

=92;

(2)(28.7-18.6÷3.1)×0.8,=(28.7-6)×0.8,

=22.7×0.8,

=18.16;

(3)16-5.32-4.68,

=16-(5.32+4.68),

=16-10,

=6;(4)40.8+14.7÷(14.6-12.5),=40.8+14.7÷2.1,

=40.8+7,

=47.8;

(5)3.7×0.125+6.3÷8,

=3.7×0.125+6.3×1 8

,=(3.7+6.3)×0.125,

=1.25;

(6)0.72+9.6÷3.2,

=0.72+3,

=3.72.

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