Question

[Đỗ Dương Minh Thư]

Tính bằng cách thuận tiện nhất:

78,43 - 52,28 - 7,65

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45,67 x 45 + 59 x 45,67 - 45,67 x 4

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Answer 1

[Nguyễn Lê Phước Thịnh]

78,43-52,28-7,65

=78,43-(52,28+7,65)

=78,43-59,93

=18,5

\(45,67\times45+59\times45,67-45,67\times4\)

\(=45,67\times\left(45+59-4\right)\)

\(=45,67\times100=4567\)

Answer 2

[456]

78,43 - 52,28 - 7,65

= (78,43 - 52,28) - 7,65

= 26,15 - 7,65

= 14,5

45,67 x 45 + 59 x 45,67 - 45,67 x 4

= 45,67 x ( 45 + 59 - 4)

= 45,67 x 100

= 4567