a) 58.57 + 58.150 – 58.125 b) 32.5 - 22.7 + 83.20190 c) 2019 + (-247) + (-53) – 2019 d) 13.70 – 50 [(19 - 32) : 2 + 23]

a) 58.57 + 58.150 – 58.125

= 3306 + 8700 - 7250

= 4756

b) 32.5 - 22.7 + 83.20190

= 160 - 154 + 1675770

= 1675776

c, 2019 + (-247) + (-53) – 2019

= 2019 - 247 - 53 - 2019

= - 300

d) 13.70 – 50 [(19 - 32) : 2 + 23]

= 910 - 50 [(-13) : 2 + 23]

= 910 - 50 [ -6,5 + 23]

= 910 - 50 [ 16,5]

= 910 - 50. 16,5

= 910 - 825

= 85

Đáp án:

Giải thích các bước giải:

a) 58.57 + 58.150 – 58.125

= 58.(57 + 150 – 125)

= 58.(207 – 125)

= 58.82 = 4756

b) 3².5 - 2².7 + 83.2019⁰

= 9.5 – 4.7 + 83.1

= 45 – 28 + 83

= 17 + 83 = 100

c) 2019 + (-247) + (-53) – 2019 

= (2019 – 2019) + (-247 – 53)

= 0 + (-300) = -300

d) 13.70 – 50 [(19 - 3²) : 2 + 2³]

= 13.70 – 50.[(19 – 9) : 2 + 8]

= 13.70 – 50.[10 : 2 + 8]

= 13.70 – 50.[5 + 8]

= 13.70 – 50.13

= 13.(70 – 50)

= 13.20 = 260