II. Tìm x: a) 69+ x = 696 b) X + 520 = 605 c) X – 218 = 235 d) 515 – X = 185 ..................................................................................................................................................................................................................................................................................................... ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ e) X x 8 = 24 x 3 g) 5 x X = 20 x 2 h) 55 : x = 20 : 4 i) 72 : x = 4x 2 ..................................................................................................................................................................................................................................................................................................... ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ III. Tính giá trị biểu thức: a) 550 : 5 x 8 b) 945 – 606 : 3 c) ( 285 + 60) : 5 x 8 d) 735: ( 3+2 ) - 50 . đ) 105 + 82 : 2 e) 420 x 2 – 120 h) 6 x ( 25 + 125) i) 150 + 25 x 3 k) 25+( 280 + 60:2) : 5 x 8 +185 l) 735: ( 3+2 ) – 50x2 + 115 m) 420 x 2 -(120x 2-125) + 10 n) 6 x 8 +25 + (125 : 5) x 2 o) 132 - 2 x ( 42 : 3) x 2 + 206 ô) 232 : 2 x (2 + 3) – 15 x 2 h) 6 x 8 +(467 - 180 : 5) i) 86 + ( 45 + 5) x 6 – 24 : 4 p) 81 : 9 + 8 x (18 - 10) + 55 q) 15 - 81 : 9 + 8 x (18 - 10) r) 416- ( 68 : 2 + 98) x 3 + 55 s) 5 x ( 25 +5 ) - 150 + 15 : 5 t) 116 + ( 68 : 2) + 198 x 3 – 55 u) 150- 50 + ( 35 +25) : 5 x 3 ư) 155 + ( 55 +25) : 5 x 3+ 25 v) 125 - 8 x 3 + ( 12 – 9) x 5 .
2 câu trả lời
Đáp án:
Giải thích các bước giải:
Bài 1
a.600
b.85
c.17
d.330
e.9
g.8
h.11
i.9
Bài 2
a.880
b.743
c.552
d.97
đ.146
e.720
h.900
i.225
k.706
l.162
Bạn cko là câu trả lời hay nhất mình làm típ
Đáp án:
II. Tìm x:
a) 69+ x = 696
x = 696 - 69
x = 627
b) X + 520 = 605
X = 605 - 520
X = 85
c) X – 218 = 235
X = 235 - 218
X = 17
d) 515 – X = 185
X = 515 - 185
X = 330
Giải thích các bước giải:
Câu hỏi trong lớp
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