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chọn đúng sai
a, 4m = 2/5 hm đúng
b, 4m =2/50 hm sai
c, 230kg=23/10 tấn đúng
d, 230kg = 23/100 sai
\(3\dfrac{5}{10}=\dfrac{35}{10}=\dfrac{7}{2}=3,5\)
\(12\dfrac{5}{100}=\dfrac{241}{20}=12,05\)
\(17\dfrac{23}{100}=\dfrac{1723}{100}=17,23\)
\(10\dfrac{7}{10}=\dfrac{107}{10}=10,7\)
3\(\dfrac{5}{10}\)=3,5;12\(\dfrac{5}{100}\)=12,05;17\(\dfrac{23}{100}\)=17,23;10\(\dfrac{7}{10}\)=10,7.
a) 3499 + 1104 : 23 − 100 = 3499 + 48 − 100 = 3447
b) 4 5 + 2 3 × 1 6 = 4 5 + 1 9 = 41 45
a : 12.03
b : 23.45
dung 999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999% luôn đó
10+2+3/100
=10+2+0,03
=12+0,03
=12,03
23+4/10+5/100
=23+0,4+0,05
=23,4+0,05
=23,45
Đáp án đung là A. \(\frac{23}{10}\)
Nếu đúng thì tích mik nha !
c. 230 nha bạn