Toán Lớp 4: Bài 1 : tìm x
X x 45 – X x 38 = 1505 128 x X – X x 16 -12 x X = 520 800
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Toán Lớp 4: Bài 1 : tìm x
X x 45 – X x 38 = 1505 128 x X – X x 16 -12 x X = 520 800
Comments ( 2 )
a, X x 45 – X x 38 = 1505
X x ( 45-38 ) = 1505
X x 7 = 1505
X = 1505 : 7
X = 215