A-A+

(1)15113÷14=(2)867-(2345+667)=(3)31.4+15.19+20

2022-08-14 02:36:57 问答库 阅读 200 次

问题详情

(1)151

13

÷14=
(2)86

7

-(23

45

+66

7

)=
(3)31.4+15.19+20.6+32.81=
(4)95

7

-34

9

+24

9

-82

7

=
(5)441

3

-231

5

-231

5

+442

3

=
(6)(13

4

+22

3

+31

4

+11

3

)÷5=
(7)9+19+199+1999=
(8)0.9+0.99+0.999+0.111=

参考答案


(1)15113÷14,
=(14+1113)×114,
=14×114+1113×114,
=1+113,
=1113;

(2)867-(2345+667),
=867-2345-667,
=867-667-2345,
=2-2345,
=12245;

(3)31.4+15.19+20.6+32.81,
=(31.4+20.6)+(15.19+32.81),
=52+48,
=100;

(4)957-349+249-827,
=(957-827)-(349-249),
=137-1,
=37;

(5)4413-2315-2315+4423,
=(4413+4423)-(2315+2315),
=89-4625,
=4235;

(6)(134+223+314+113)÷5,
=[(134+314)+(223+113)]÷5,
=[5+4]÷5,
=9÷5,
=1.8;

(7)9+19+199+1999,
=(1+1+1+6)+19+199+1999,
=(1+19)+(1+199)+(1+1999)+6,
=20+200+2000+6,
=2220+6,
=2226;

(8)0.9+0.99+0.999+0.111,
=0.9+0.99+0.999+(0.1+0.01+0.001),
=(0.9+0.1)+(0.99+0.01)+(0.999+0.001),
=1+1+1,
=3.

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