Toán Lớp 3: Tìm x a) x + 5 × 4 = 48 b) x ÷ 6 +15 = 81 c) 92 × x ÷ 2 = 117 + 259 d) 84 ÷ x + 6 = 8

Question

Toán Lớp 3:  Tìm x a) x + 5 × 4 = 48 b) x ÷ 6 +15 = 81 c) 92 × x ÷ 2 = 117 + 259 d) 84 ÷ x + 6 = 8

ngoclandiep · Answer

a) x + 5 &times; 4 = 48     x+20=48     x=48-20     x=28     b) x &divide; 6 +15 = 81     x / (l&agrave; dấu chia ) 21=81     x=81x21     x=1701     c) 92 &times; x &divide; 2 = 117 + 259     92 x X / 2= 376     92 x X = 376*2     92 x X = 752     x = 752/92     x= 8 dư 16     d) 84 &divide; x + 6 = 8     84 / x = 8-6     84/x= 2     x= 84/2     x=42

hauthanhyen98 · Answer

$ text{a) x + 5 &times; 4 = 48}$       $ text{x + 20 = 48}$       $ text{x = 48 - 20 }$       $ text{x = 28}$   $ text{b) x : 6 + 15 = 81}$       $ text{x : 6 = 81 - 15}$       $ text{x : 6 = 66}$       $ text{x = 66 &times; 6 }$       $ text{x = 396}$   $ text{c)  92 &times; x : 2 = 117 + 259}$         $ text{92 &times; x : 2 = 376}$       $ text{92 &times; x = 376 &times; 2 }$       $ text{92 &times; x = 752}$         $ text{x = 752 : 92}$         $ text{x = $ dfrac{752}{92}$}$   $ text{d) 84 : x + 6 = 8}$       $ text{84 : x = 8 - 6}$       $ text{84 : x = 2}$         $ text{x  = 84 : 2}$         $ text{x = 42}$   $ text{Xin hay nhất v&agrave; 5 sao ạ}$