脫式計算 (能用簡便方法就用簡便方法)15 64 2 53 7 47 3 7 6 3 0 6

2021-04-17 13:39:29 字數 3146 閱讀 1522

1樓:手機使用者

(du1)15.64-2.53-7.47

=15.64-(2.53+7.47),zhi=15.64-10,

=5.64;

(2)3.7+6.3÷0.6-0.4

=3.7+10.5-0.4,

=13.8;

(3)3.5÷[(0.45-0.38)×0.1]=3.5÷[0.07×0.1],

=3.5÷0.007,

=500;

(4)5.6×7.2+4.4×7.2

=(5.6+4.4)×7.2,

=10×7.2,

=72.dao

3.4×1.5+7.2÷0.6用簡便方式計算,怎麼計算?

2樓:妙酒

3.4×1.5+7.2÷0.6

=5.1+72÷0.6

=5.1+12

=17.1

能簡便的用簡便方法計算.6.5÷5+3.5×0.5 7.85÷0.25÷0.4 15....

3樓:手機使用者

(1)6.5÷5+3.5×0.5

=1.3+1.75

=3.05

(2)7.85÷0.25÷0.4

=7.85÷(0.25×0.4)

=7.85÷0.1

=78.5

(3)15.64-2.53-7.47

=15.64-(2.53+7.47)

=15.64-10

=5.64

(4)36+61.2÷12

=36+5.1

=41.1

(5)0.25×(4+0.8)

=0.25×4+0.8×0.25

=1+0.2

=1.2

(6)7.8÷2.6-0.05×0.02

=3-0.001

=2.999

4樓:開萱由琬

小數點後都是0.25

小數點前的規律是

0=0×(0+1)

12=3×(3+1)

42=6×(6+1)

不懂請追問,望採納,謝謝~

用遞等式的格式計算(能簡算的可以用簡便方法計算)7.2÷1.8+6.8×0.53.7+6.3÷0.6-0.43.5÷〔(0.45-0.3

5樓:百度使用者

(1)7.2÷1.8+6.8×0.5,

=4+3.4,

=7.4;

(2)3.7+6.3÷0.6-0.4,

=3.7+10.5-0.4,

=14.2-0.4,

=13.8;

(3)3.5÷[(0.45-0.38)×0.1],=3.5÷(0.07×0.1),

=3.5÷0.007,

=500;

(4)5.6×7.2+4.4×7.2,

=(5.6+4.4)×7.2,

=10×7.2,

=72.

用簡便方法計算.(要求寫出簡便過程) 15.3-7.28+4.7-2.72 (24+ 6 7 )÷6 7

6樓:嬤嬤

(1)15.3-7.28+4.7-2.72,=15.3+4.7-(7.28+2.72),=20-10,

=10;

(2)(24+6 7

)÷6,

=24×1 6

+6 7

×1 6

,=4+1 7

,=41 7

;(3)7 9

×5 11

+7 9

÷11 6

,=7 9

× (5

11+6 11

),=7 9

×1 ,

=7 9.

計算下面各題,能用簡便方法的就用簡便方法計算.(1)15.52-1.6×5-5.7 ...

7樓:手機使用者

(復1)15.52-1.6×5-5.7,

制=15.52-8-5.7,bai

=7.52-5.7,

=1.82;

du(2)9.83×1.5+6.17×1.5,=1.5×(zhi9.83+6.17),

=1.5×16,

=1.5×2×8,

=24;

(3)19.8-0.6×0.6-0.64,=19.8-0.36-0.64,

=19.8-(0.36+0.64),

=19.8-1,

=18.8;

(4)0.125×7.9×8,

=0.125×8×7.9,

=1×7.9,

=7.9;

(5)63×10.1,

=63×(10+0.1),

=63×10+63×0.1,

=630+6.3,

=636.3;

(6)21.5÷[(6.07+2.53)×dao0.5],=21.5÷[8.6×0.5],

=21.5÷[0.5×2×4.3]

=21.5÷4.3,=5.

用遞等式計算,寫出必要的計算過程,能簡便運算的要用簡便方法計算.100-870÷29-8815÷7.5+4.6-6.63.5×

8樓:桃兒

①100-870÷

29-88

=100-30-88

=-18

②15÷7.5+4.6-6.6

=2+4.6-6.6

=6.6-6.6

=0③3.5×

64×12.5

=(3.5×8)×內(8×12.5)

=28×100

=2800

④容51×7.5-49×7.5-1

=(51-49)×7.5-1

=2×7.5-1

=15-1

=14⑤4×(4.8+3.2÷4-5.6)=4×(4.8+0.8-5.6)

=4×0

=0⑥[8+(5-2)÷1.2]×5

=[8+3÷1.2]×5

=10.5×5

=52.5

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