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怎样简便就怎样计算:910×78÷(45+14)5-78-0.125(14-14×12)÷1

2022-08-14 02:40:25 问答库 阅读 200 次

问题详情

怎样简便就怎样计算:
9

10

×7

8

÷(4

5

+1

4

)5-7

8

-0.125

(1

4

-1

4

×1

2

)÷1

4

5

6

+9

8

×5

9

×8

9

9×5

6

+5

6

÷1

9

7

9

×(1÷7

8

+8

7

÷1)

34

50

×4

7

-4

7

×9

50

99×99

100

参考答案


(1)910×78÷(45+14),
=6380÷2120,
=34;

(2)5-78-0.125,
=5-(78+0.125),
=5-1,
=4;

(3)(14-14×12)÷14,
=(14-14×12)×4,
=14×4-14×12×4,
=1-12,
=12;

(4)56+98×59×89,
=56+98×89×59,
=56+59,
=2518;

(5)9×56+56÷19,
=9×56+56×9,
=9×(56+56),
=9×53,
=15;

(6)79×(1÷78+87÷1),
=79×(87+87),
=79×167,
=169;

(7)3450×47-47×950,
=(3450-950)47,
=12×47,
=27;

(8)99×99100,
=(100-1)×99100,
=100×99100-1×99100,
=99-99100,
=981100.

考点: