1,5 x 8+ 0,15 x 8,4 + 6 x 2 tính nhanh
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Tỉ số giữa cây cam và cây bưởi là :
120:150=0,8=80%
Đ/s 80%
a) (x + 1,2) : 2,5 = 5
x + 1,2 = 5 . 2,5
x + 1,2 = 12,5
x = 12,5 - 1,2
x = 11,3
Vậy x = 11,3
\(b)4,25.x=53,38\)
\(x=53,38:4,25\)
\(x=12,56\)
Vậy x = 12,56
\(c)x.\frac{1}{2}+\frac{3}{4}=1\)
\(x.\frac{1}{2}=1-\frac{3}{4}\)
\(x.\frac{1}{2}=\frac{1}{4}\)
\(x=\frac{1}{4}:\frac{1}{2}\)
\(x=\frac{1}{2}\)
Vậy \(x=\frac{1}{2}\)
\(d)\frac{2}{7}+\frac{5}{7}:x=5-\frac{1}{7}\)
\(\frac{2}{7}+\frac{5}{7}:x=\frac{34}{7}\)
\(\frac{5}{7}:x=\frac{34}{7}-\frac{2}{7}\)
\(\frac{5}{7}:x=\frac{32}{7}\)
\(x=\frac{5}{7}:\frac{32}{7}\)
\(x=\frac{5}{32}\)
Vậy \(x=\frac{5}{32}\)
e) x - 2448 : 24 = 102
x - 102 = 102
x = 102 + 102
x = 204
Vậy x = 204
Kelly: Where did you go last weekend?
Jack: I went to my hometown.
Kelly: How did you get there?
Jack: I went by coach
Kelly: Where did you go last weekend?
Jack: I went to my hometown.
Kelly: How did you get there?
Jack: I went by car.
Đổi 1h30p=1,5h
Vận tốc của thuyền khi ngược dòng là:
22,6-2,2=20,4(km/h)
Độ dài quãng sông AB là:
20,4x1,5=30,6(km)
Đáp số:30,6km
Read and complete:
bring about designed entertaining include through
events in addition to make means pictures
Television is one of our most important (1) ____mean ____ of communication. It brings (2) __pictures_____ and sounds from around the word into millions of homes. A person with a television set can sit in his house and watch the President (3) ___make______ a speech or visit a foreign country. He can see a war being fought and watch statesment try to (4) ___bring_____ peac, places and things in far away lands.
(6) ___ in addition to ______ all these things, television brings its viewers a steady streamof programs that are (7) ____ designed _____ to entertain. In fact, TV provides many more (8) __entertaining______ programs than any other kinds. The programs (9) _____include____ action-packed dramas, light comedies, sporting (10) ____events_____, and motion pictures.
Tổng số phần bằng nhau là:3+5=8 (phần)
Số lớn là:480:8x5=300
Số bé là:480-300=180
= 25,26
tào lao