3^3 . 18 - 3^3 . 12
Những câu hỏi liên quan
câu trả lời cho câu hỏi của Huong Le Thị Lan: 1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32.
=(1+32)+(2+31)+(3+30)+(4+29)+(5+28)+(6+27)+(7+26)+(8+25)+(9+24)+(10+23)+(11+22)+(12+21)+(13+20)+(14+19)+(15+18)+(16+17)
=33+33+33+33+33+33+33+33+33+33+33+33+33+33+33+33. =33.16 (dấu chấm là dấu nhân)=528
wow! mù mắt. Ido tính toán có khác!
C2:(32+1)x32:2=528
bạn tính thử xem đúng đấy.
Xem thêm câu trả lời
A=-5/18+32/45-9/10+(-1/4+7/33-5/33)-(-15/12+6/11+8/15) = ?
Tính nhanh:
27 . 18 +27 .103 -120 . 27
15 . 33 + 33 . 12
\(\frac{27.18+27.103-120.27}{15.33+33.12}\)
\(=\frac{27\left(18+103-120\right)}{33\left(15+12\right)}\)
\(=\frac{27.1}{33.27}\)
\(=\frac{1}{33}\)
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6/21- -12/44+ 10/14 -1/-4 - 18/33
\(\dfrac{6}{21}-\dfrac{-12}{44}+\dfrac{10}{12}-\dfrac{-1}{4}-\dfrac{18}{33}\)
\(=\dfrac{6}{21}+\dfrac{12}{44}+\dfrac{10}{12}+\dfrac{1}{4}-\dfrac{18}{33}\)
\(=\dfrac{1013}{924}\)
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\(\dfrac{6}{21}-\dfrac{-12}{44}+\dfrac{10}{44}-\dfrac{1}{-4}-\dfrac{18}{33}\)
\(=\dfrac{2}{7}+\dfrac{3}{11}+\dfrac{5}{7}+\dfrac{1}{4}-\dfrac{9}{11}\)
\(=\left(\dfrac{2}{7}+\dfrac{5}{7}\right)+\left(\dfrac{3}{11}-\dfrac{9}{11}\right)+\dfrac{1}{4}\)
\(=1+-\dfrac{6}{11}+\dfrac{1}{4}\)
\(=\dfrac{5}{11}+\dfrac{1}{4}\)
\(=\dfrac{31}{44}\)
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RÚT GỌN
16 x 18 - 16 x 7
15 x 33 + 33
SO SÁNH
-13/12 và -19/18
Tinh :6/21+12/44+10/14+1/4-18/33
6/21- (-12/44) + (10/14)-(1/-4)-18/33 Tính hợp lí
`6/21-(-12/44)+10/14-(1/(-4))-18/33`
`=2/7+12/44+5/7-((-1)/4)-6/11`
`=2/7+3/11+5/7+1/4-6/11`
`=(3/11-6/11)+(2/7+5/7)+1/4`
`=-3/11+7/7+1/4`
`=43/44`
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tính bằng cách thuận tiện nhất
1235 x 6789 x ( 630 - 315 x 2 )
( 100 + 67 ) x 67 + ( 200 - 33 ) x 33
72 + 36 x 2 + 24 x 3 + 18 x 4 +12 x 2 +168
\(1235\text{×}6789\text{×}\left(630-315\text{×}2\right)\)
\(=1235\text{×}6789\text{×}\left(630-630\right)\)
\(=1235\text{×}6789\text{×}0=0\)
\(\left(100+67\right)\text{×}67+\left(200-38\right)\text{×}33\)
\(=167\text{×}67+167\text{×}33\)
\(=167\text{×}\left(67+33\right)\)
\(=167\text{×}100=16700\)
\(72+36\text{×}2+24\text{×}3+18\text{×}4+12\text{×}2+168\)
\(=72+72+72+72+24+168\)
\(=\left(72\text{×}4\right)+24+168=288+24+168=480\)
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a) \(1235\times6789\times\left(630-630\right)\)
\(=1235\times6789\times0\)
\(=1235\times0\)
\(=0\)
b) \(167\times67+167\times33\)
\(=167\times\left(67+33\right)\)
\(=167\times100\)
=16700
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a)-|-33|+(-12)+18+|45-40|-57
b)|40-37|-|13-52|
a)-|-33|+(-12)+18+|45-40|-57
=-33-12+18+|5|-57
=-45+18+5-57
=-27+5-57
=-22-57
=-79
b)|40-37|-|13-52|
=|3|-|-39|
=3-39
=-36
SGK Kết nối tri thức với cuộc sống - Trang 117
24 tháng 8 2023 lúc 23:52
Rút gọn các phân số: \(\dfrac{15}{25};\dfrac{24}{28};\dfrac{18}{33};\dfrac{12}{36}\).
\(\dfrac{15}{25}=\dfrac{15:5}{25:5}=\dfrac{3}{5}\\ \dfrac{24}{28}=\dfrac{24:4}{28:4}=\dfrac{6}{7}\\ \dfrac{18}{33}=\dfrac{18:3}{33:3}=\dfrac{6}{11}\\ \dfrac{12}{36}=\dfrac{12:12}{36:12}=\dfrac{1}{3}.\)
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\(\dfrac{15}{25}=\dfrac{3}{5}\)
\(\dfrac{24}{28}=\dfrac{6}{7}\)
\(\dfrac{18}{33}=\dfrac{6}{11}\)
\(\dfrac{12}{36}=\dfrac{1}{3}\)
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\(\dfrac{15}{25}=\dfrac{15:5}{25:5}=\dfrac{3}{5}\\ \dfrac{24}{28}=\dfrac{24:4}{28:4}=\dfrac{6}{7}\\ \dfrac{18}{33}=\dfrac{18:3}{33:3}=\dfrac{6}{11}\\ \dfrac{12}{36}=\dfrac{12:12}{36:12}=\dfrac{1}{3}\)
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