Question

Bài 1: Tính hợp lí

1) 3⁶.7+3⁴.37+19.100

2)2.14.98+7.4.32-28.30

3)(56.35+56.18):53

4)(158.129-158.39):28

5)123.456+456.321-256.444

6)(252+2.28-5.28):28

Bài 2: Thực hiện phép tính

1)3⁷:3³+2³:4

2)(81².5⁸-15⁶.25.9):(2010²⁰¹¹.2011²⁰¹²...2014²⁰¹⁵⁾

 

Answer 1

Bài 1:

1. 3⁶.7 + 3⁴.37 + 19.100

= 3⁴.(3².7 + 37) + 19.100

= 81.100 + 19.100

= 100.(81 + 19)

= 100.100

= 10000

2) 2.14.98+7.4.32-28.30

= 28.98 + 28.32 - 28.30

= 28. (98 + 32 - 30)

= 28.100

= 2800

3) (56.35+56.18):53

= [56.(35 + 18)] : 53

= 56.53:53

= 56

4) (158.129-158.39):28

= [158. (129 - 39)] : 28

= 158.90:28

= 5,675

Answer 2

Các bạn hãy trả lời nhanh giúp mìk

Answer 3

5)123.456+456.321-256.444

= 456. (123 + 321) - 256.444

= 456 . 444 - 256.444

= 444.(456 - 256)

= 444.200

= 88800

6) (252+2.28-5.28):28

= (9.28 + 2.28 - 5.28) : 28

= 28.(9 + 2 - 5) : 28

= 28.6:28

= 6.

Answer 4

1) 3⁷ : 3³ + 2³ : 4

= 3⁴ + 8 : 4

= 81 + 2

= 83

2) (81².5⁸-15⁶.25.9):(2010²⁰¹¹.2011²⁰¹²...2014²⁰¹⁵⁾

= (3⁸.5⁸ - 15⁶.25.9):(2010²⁰¹¹.2011²⁰¹²...2014²⁰¹⁵)

= (3⁸.5⁸ - 3⁶.5⁶.5².3²):(2010²⁰¹¹.2011²⁰¹²...2014²⁰¹⁵)

= (3⁸.5⁸ - 3⁸.5⁸):(2010²⁰¹¹.2011²⁰¹²...2014²⁰¹⁵)

= 0 :(2010²⁰¹¹.2011²⁰¹²...2014²⁰¹⁵)

= 0 .

Answer 5

Còn bài 2