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18 . 26 . 25 . 9
= ( 18 . 25 ) . ( 26 . 9 )
= 450 . 234
= 105 300
2 . 450 . 25 . 8
= ( 2 . 450 ) . ( 25 . 8 )
= 900 . 200
= 180 000
55 . 17 .16 . 15
( 15 . 16 ) . ( 55 . 17 )
= 240 . 935
= 224 400
125 . 98 . 2 . 8 . 25
( 25 .8 ) . ( 125 . 2 ) . 98
= 200 . 250 . 98
= 50 000 . 98
= 4 900 000
15 . 6 . 4 . 125 . 8
= ( 125 . 4 ) . ( 15 . 8 ) . 6
= 500 . 120 . 6
= 60 000 . 6
= 36 000
chúc bạn may mắn . tick cho mình nhé !
a: \(=\left(18\cdot25\right)\cdot9\cdot26=234\cdot450=105300\)
b: \(=\left(25\cdot8\cdot2\right)\cdot450=400\cdot450=180000\)
c: \(=\left(55\cdot17\right)\cdot16\cdot15=240\cdot935=224400\)
d: \(=125\cdot8\cdot2\cdot25\cdot98=98\cdot50\cdot1000=4900000\)
e: \(=125\cdot8\cdot15\cdot4\cdot6=1000\cdot360=360000\)
18 . 26 . 25 . 9
= ( 18 . 25 ) . ( 26 . 9 )
= 450 . 234
= 105 300
2 . 450 . 25 . 8
= ( 2 . 450 ) . ( 25 . 8 )
= 900 . 200
= 180 000
55 . 17 .16 . 15
( 15 . 16 ) . ( 55 . 17 )
= 240 . 935
= 224 400
125 . 98 . 2 . 8 . 25
( 25 .8 ) . ( 125 . 2 ) . 98
= 200 . 250 . 98
= 50 000 . 98
= 4 900 000
15 . 6 . 4 . 125 . 8
= ( 125 . 4 ) . ( 15 . 8 ) . 6
= 500 . 120 . 6
= 60 000 . 6
= 36 000
chúc bạn may mắn . tick cho mình nhé !
`@` `\text {Ans}`
`\downarrow`
`x^3 = 125`
`=> x^3 = 5^3`
`=> x = 5`
Vậy, `x = 5`
_____
`4^5 \div 4^3`
`=`\(4^{5-3}\)
`= 4^2`
______
\(8^{12}\cdot8^3\div8^{15}\)
`=`\(8^{12+3-15}\)
`=`\(8^0=1\)
______
\(7^{15}\div7^{13}\)
`=`\(7^{15-13}\)
`=`\(7^2\)
_______
\(17^{15}\cdot17^{10}\div17^{22}\)
`=`\(17^{15+10-22}\)
`= 17^3`
_______
\(5^{10}\cdot25\div5^{11}\)
`=`\(5^{10}\cdot5^2\div5^{11}\)
`=`\(5^{10+2-11}\)
`= 5`
_______
\(15^{10}\cdot225\div15^{11}\)
`=`\(15^{10}\cdot15^2\div15^{11}\)
`=`\(15^{12}\div15^{11}\)
`= 15`
`@` `\text {Kaizuu lv uuu}`
\(x^3=125\)
\(\Rightarrow x^3=5^3\)
\(\Rightarrow x=3\)
___________________
\(4^5:4^3\)
\(=4^{5-3}\)
\(=4^2=16\)
___________________
\(8^{12}.8^3:8^{15}\)
\(=8^{15}:8^{15}\)
\(=1\)
___________________
\(7^{15}:7^{13}\)
\(=7^{15-13}\)
\(=7^2=49\)
___________________
\(17^{15}.17^{10}:17^{22}\)
\(=17^{25}:17^{22}\)
\(=17^3=4913\)
___________________
\(5^{10}.25:5^{11}\)
\(=5^{10}.5^2:5^{11}\)
\(=5^{12}:5^{11}\)
\(=5^1=5\)
___________________
\(15^{10}.225:15^{11}\)
\(=15^{10}.15^2:15^{11}\)
\(=15^{12}:15^{11}\)
\(=15^1=15\)
__________________
* an . am = an+m
an : am = an-m
Chúc bạn học tốt
1) (-6 - 2) . (-6 + 2) = -8 . (-4) = 32
2) 627 + 125 + (-627) + |-46| -21 = 125 + 46 - 21 = 150
3) (-25) + 30 + (-16) + 25 + (-4) = 30 + (-20) = 10
4) 75 - 5.(15 - 40) - (-60) = 75 - 75 + 80 + 60 = 140
5) |31 - 17| - |15 - 52| = |14| - |-37| = 14 - 37 = -23
6) 13 - 18 - (-42) - 15 = 13 - 18 + 42 - 15 = 22
3 bài sau hết kiên nhẫn rồi, thông cảm nhé.
(-125).25.(-3).(-8).(-4).(-15)
=[(-125).(-8)].[25.(-4)].(-15)
=1000.(-100).(-15)
=(-100000).(-15)
=1500000
tk nha!
\(\left(-125\right).25.\left(-3\right).\left(-8\right).\left(-4\right).\left(-15\right)\)
\(=\left[\left(-125\right).\left(-8\right)\right].\left[25.\left(-4\right)\right].\left[\left(-3\right).\left(-15\right)\right]\)
\(=1000.\left(-100\right).45\)
\(=-100000.45\)
\(=-4500000\)