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脱式计算(1)49×37×13(2)112×12(3)36×(14+518)(4)10.5÷

2022-08-14 02:57:36 问答库 阅读 200 次

问题详情

脱式计算
(1)49×3

7

×1

3

(2)1

12

×12(3)36×(1

4

+5

18

)

(4)10.5÷10.5×7

10

(5)(1+3

4

)÷(1-3

4

)(6)2.5×31

3

×0.4×3

10

(7)7

10

×5

16

÷21

32

(8)(7

10

-7

10

×2

7

)÷1

4

(9)1.4×3.7+3.7×8.6.

参考答案


(1)49×37×13,
=49×(37×13),
=49×17,
=7;

(2)112×12=1;

(3)36×(14+518),
=36×14+36×518,
=9+10,
=19;

(4)10.5÷10.5×710,
=1×710,
=710;

(5)(1+34)÷(1-34),
=134÷14,
=7;

(6)2.5×313×0.4×310,
=(2.5×0.4)×(313×310),
=1×1,
=1;

(7)710×516÷2132,
=732÷2132,
=13;

(8)(710-710×27)÷14,
=(710-15)÷14,
=12÷14,
=2;

(9)1.4×3.7+3.7×8.6,
=(1.4+8.6)×3.7,
=10×3.7,
=37.

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