Toán Lớp 5: Đặt tính rồi tính
6,9828:2,53
Tìm X
A) X x8,7 – 2,02 = 264,2
b) Xx 1,25+5,61= 6,485
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Toán Lớp 5: Đặt tính rồi tính
6,9828:2,53
Tìm X
A) X x8,7 – 2,02 = 264,2
b) Xx 1,25+5,61= 6,485
Comments ( 2 )
$6,9828:2,53$
$a) x ×8,7 – 2,02 = 264,2$
$⇔ x ×8,7 =266,22$
$⇔ x =266,22:8,7$
$⇔ x =30,6$
$b) x × 1,25+5,61= 6,485$
$⇔ x × 1,25= 0,875$
$⇔ x = 0,875:1,25$
$⇔ x = 0,7$