計算下列各題,要寫出主要計算過程,能簡便的要用簡便方法計算113 360 24 18nb

2021-04-21 09:01:37 字數 1958 閱讀 4014

1樓:手機使用者

①113+360÷24-18

=113+15-18

=128-18

=110;

②bai8.5×du2.8+2.8×1.5=(zhi8.5+1.5)×

dao2.8

=10×2.8

=28;

③(14+29

)×36=14

×36+2

9×36

=9+8

=17;④(回

13+12

)÷答(1-38)

=56÷58

=43.

計算下列各題,要寫出主要計算過程,能用簡便方法的要用簡便方法計算. ①16×18-120÷15 ②3.2×2.

2樓:手機使用者

①16×18-120÷15,

=288-8,

=280;

②3.2×2.77+0.23×3.2,

=3.2×(62616964757a686964616fe59b9ee7ad94313333353365362.77+0.23),

=3.2×3,

=9.6;

③7.6-2.05÷0.82,

=7.6-2.5,

=5.1;

④7 8

-517

+9 8

-1217

,=(7 8

+9 8

)-(5

17+12

17),

=2-1,

=1;⑤2 9

-716

×2 9

,=2 9

×(1-7

16),

=2 9

×916

,=1 8

;⑥13÷(1 4

+5 6

)×3 4

,=13÷13

12×3 4

,=12×3 4

,=9.

下面各題,能簡便計算的要用簡便方法計算.68×35-408÷24     57+98×79+18(0.63-0.63÷3)×0.53.

3樓:手機使用者

(制1)68×

35-408÷24

=2380-17

=2363;

(2)57+9

8×79+1

8=57+(78+1

8)=57

+1=157;

(3)(0.63-0.63÷3)×0.5

=(0.63-0.21)×0.5

=0.42×0.5

=0.21;

(4)3.64×0.25+4.36×0.25=(3.64+4.36)×0.25

=8×0.25

=2;(5)1.3-3.79+9.7-6.21=1.3+9.7-(3.79+6.21)

=11-10

=1;(6)3

22÷[5

4÷(143-1

2)]=322

÷[54

×625]=3

22×103=511.

計算下面各題,能簡便的最好用簡便方法計算.4.1÷0.41+22.5 &...

4樓:手機使用者

①bai4.1÷0.41+22.5

=10+22.5

=32.5

②2.01×

du99+2.01

=2.01×(

zhi99+1)

=2.01×100

=201

③5.6×3.9+3.9×4.4

=3.9×(5.6+4.4)

=3.9×10

=39④dao6.9×1.25×0.8

=6.9×(1.25×0.8)

=6.9×1

=6.9

計算要求寫出主要計算過程

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