計算,能簡便的要簡便計算

2021-03-04 08:48:58 字數 3789 閱讀 6363

1樓:盈公子

(1)642-(36+132)÷4

=642-168÷4

=642-42

=600;

(2)375+125÷5×12

=375+25×12

=375+300

=675;

(3)868-(168+54)

=868-168-54

=700-54

=646;

(4)88×27+27×12

=(88+12)×27

=100×27

=2700;

(5)65×99+65

=65×(99+1)

=65×100

=6500;

(6)15×23-23×5

=(15-5)×23

=10×23

=230;

(7)125×32×5

=125×8×4×5

=(125×8)×(4×5)

=1000×20

=20000;

(8)35×202

=35×(200+2)

=35×200+35×2

=7000+70

=7070;

(9)98×15

=(100-2)×15

=100×15-2×15

=1500-30

=1470;

(10)3500÷4÷25

=3500÷(4×25)

=3500÷100

=35;

(11)25×28

=25×(4×7)

=25×4×7

=100×7

=700;

(12)545-167-145

=545-145-167

=400-167

=233.

642-(36+132)÷4的簡便計算

2樓:寶寶

642-(36+132)÷4的簡便計算

解:直接運算最簡便,

原式=642-168÷4

=642-42

=600

3樓:518姚峰峰

642-(36+132)÷4的簡便計算

=642-(36+100+32)/4

=642-(9+25+8)

=642-42

=600

4樓:匿名使用者

=642-36÷4-132÷4

=642-9-33

=642-42

=600

計算下面各題,能簡便計算的用簡便方法計算 2-6/13÷9/26 (1/3+1/4)×36 6/7×(4/5-2/3)÷1/5

5樓:數學新綠洲

2-6/13÷9/26

= 2- (6/13)×(26/9)

=2- 4/3

=2/3

.(1/3+1/4)×36

=(1/3)×36 +(1/4)×36

=12+9

=21.

6/7×(4/5-2/3)÷1/5

=(6/7)×(4/5 - 2/3)×5

=(6/7)×(4 - 10/3)

=(6/7)×(2/3)

=4/7

.3/4-3/4×4/7+9/7

=(3/4)×(1- 4/7)+

9/7=(3/4)×(3/7)+9/7

=(1/4)×(9/7)+ 9/7

=(1/4 +1)×(9/7)

=(5/4)×(9/7)

=45/28

=1又17/28

脫式計算,能簡便的要簡便計算.42÷(5.25÷0.25) 0.4+12.6÷0.28×0.2 8.4-8.4×1.5÷1.8 0.27×

6樓:嘎啦

①42÷自(5.25÷0.25)

=42÷(5.25×4)

=42÷21

=2②0.4+12.6÷0.28×0.2

=0.4+45×0.2

=0.4+9

=9.4

③8.4-8.4×1.5÷1.8

=8.4×(1-5 6

)=8.4×1 6

=1.4

④0.27×99+0.27

=0.27×(99+1)

=0.27×100

=27⑤2.5×3.2×0.125

=2.5×(0.4×8)×0.125

=(2.5×0.4)×(8×0.125)

=1×1

=1⑥13.5÷2.5÷0.

125÷0.4÷8=13.5÷(2.

5×0.125×0.4×8)=13.

5÷[(2.5×0.4)×(0.

125×8)]=13.5÷[1×1]

=13.5÷1

=13.5.

用遞等式計算,能用簡便方法的用簡便方法計算. 45-20×3÷4 26+14×(70-30) 125×(8×4)203×24 10

7樓:ˉever·專屬七

(1)45-20×

dao3÷4,內

=45-60÷4,

=45-15,

=30;

(2)26+14×(70-30),

=26+24×40,

=26+960,

=986;

(3)125×(8×4),

=125×8×4,

=1000×4,

=4000;

(4)203×24,

=(200+3)×容24,

=200×24+3×24,

=4800+72,

=4872;

(5)108-(83+360÷60),

=108-(83+6),

=108-89,

=19;

(6)153×8-8×53,

=(153-53)×8,

=100×8,

=800;

(7)180÷[36÷(12+6)],

=180÷[36÷18],

=180÷2,

=90;

(8)75×99+75,

=75×(99+1),

=75×100,

=7500.

下面各題能簡算的要用簡便計算.1.36+4.85+2.64+6.15 98.5÷2.5÷4 5.4÷[2.5×(3.7-2.9)]0.8×(4-3.6

8樓:□小千

(1)1.36+4.85+2.64+6.15,=(1.36+2.64)+(4.85+6.15),=4+11,

=15;

(2)98.5÷2.5÷4,

=98.5÷(2.5×4),

=98.5÷10,

=9.85;

(3)5.4÷[2.5×(3.7-2.9)],=5.4÷[2.5×0.8],

=5.4÷2,

=2.7;

(4)0.8×(4-3.68)÷0.01,=0.8×0.32÷0.01,

=0.256÷0.01,

=25.6;

(5)83.7-12.83-0.17,

=83.7-(12.83+0.17),

=83.7-13,

=70.7;

(6)5.96+13×(3.2-3.12),=5.96+13×0.08,

=5.96+1.04,=7.

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