Đáp án:

Giải thích các bước giải:

$70^{o}$ F= ($70^{o}$ F - $32^{o}$ F):1,8=$38^{o}$ F : 1,8 = $21,1^{o}$ C

$120^{o}$ F= ($120^{o}$ F - $32^{o}$ F ):1,8=$88^{o}$ F : 1,8 =$48,8^{o}$ C

$180^{o}$ F=($180^{o}$ F - $32^{o}$ F ):1,8= $148^{o}$ F : 1,8= $82,2^{o}$ C

$220^{o}$ F =($220^{o}$ F - $32^{o}$ F):1,8= $188^{o}$ F : 1,8 = $104,4^{o}$ C

$20^{o}$ C = $0^{o}$C +$20^{o}$ C = $32^{o}$ F + ($20^{o}$C x 1,8)= $32^{o}$ F + $36^{o}$ F =$68^{o}$ F

$45^{o}$ C = $32^{o}$ F + ($45^{o}$C x 1,8 )= $32^{o}$ F + $81^{o}$ F=$113^{o}$ F

$100^{o}$ C = $32^{o}$ F + ($100^{o}$ C x 1,8)=$32^{o}$ F + $180^{o}$ F =$212^{o}$ F $125^{o}$ C = $32^{o}$ F + ($125^{o}$ C x 1,8)=$32^{o}$ F + $225^{o}$ F = $257^{o}$ F 

nhớ cho câu trả lời hay nhất nhé

Đáp án:

 70F≈21C

120F≈49C

 180F≈82C

 220F≈104C

20C=68F

45C=113F

100C=212F

125C=257F