Toán Lớp 5: tìm x biết
X x 2,5 – 3,46 = 4,68
X : 2,5 + 2,15 = 7,28
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Toán Lớp 5: tìm x biết
X x 2,5 – 3,46 = 4,68
X : 2,5 + 2,15 = 7,28
Comments ( 2 )
$@Zeng$
x×2,5-3,46=4,68
x×2,5=4,68+3,46
x×2,5=8,14
x=8,14:2,5
x=3,256
x:2,5+2,15=7,28
x:2,5=7,28-2,15
x:2,5=5,13
x=5,13×2,5
x=12,825
a) X x 2,5 – 3,46= 4,68
⇒ X x 2,5= 4.68-3.46
⇒ X x 2,5=1.22
⇒ X = 1.22:2.5
⇒ X=0.488
b) X : 2.5 + 2.15= 7.28
⇒ X : 2.5= 7.28-2.15
⇒ X : 2.5=5.13
⇒ X=5.13 x 2.5
⇒ X= 12.825
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