Thực hiện phép tính:
e) 295-(31-2².5)²+7^18:7^16+2^2.3^3
f) (5^19:5^17+3):7+7^9:7^7-3²+2³.5²
g) 1200:2+6².2^1+18+5^9:5^7+70:14-20
h) 3².5-2².7+83+5^9:5^7+12.3+7^0
Thực hiện phép tính:
e) 295-(31-2².5)²+7^18:7^16+2^2.3^3
f) (5^19:5^17+3):7+7^9:7^7-3²+2³.5²
g) 1200:2+6².2^1+18+5^9:5^7+70:14-20
h) 3².5-2².7+83+5^9:5^7+12.3+7^0
Đáp án:
`e) 295-(31-2^2 .5)^2+7^18 :7^16+2^2 .3^3`
`= 295 – (31 – 4.5)^2 + 7^2 + 4.9 `
`= 295 – 11^2 + 49 + 36`
`= 295 – 121+49+36`
`=259`
`f) (5^19:5^17+3):7+7^9:7^7-3^2+2^3 .5^2`
`= (5^2 + 3 ) : 7 + 7^2 – 9 + 8 . 25`
`= (25+3) : 7 + 49 – 9 + 200
`= 28 : 7 + 40 + 200`
`= 4 + 240`
`=244`
`g) 1200:2+6^2 .2^1+18+5^9 :5^7+70:14-20`
`= 600 + 36.2 + 18 + 5^2 + 5 – 20`
`= 600 + 72 + 18 + 25 + 5 – 20`
`= 690 + 10`
`= 700`
`h) 3^2 .5-2^2 .7+83+5^9:5^7+12.3+7^0`
`= 9 .5 – 4 .7 + 83 + 5^2 + 36 + 1`
`= 45 – 28 + 83 + 25 + 36 + 1`
`= 100 + 62`
`=162`
Học tốt !
@Holliwood#:
Đáp án:
e) 439
f) 244
g) 700
h) 162
Giải thích các bước giải:
e) 295 − ( 31 − 2² . 5 )²+$7^{18}$:$7^{16}$ + 2² . 3³
= 295 − 121 + 49 + 216
= 439
f) ($5^{19}$:$5^{17}$ +3) : 7 + $7^{9}$:$7^{7}$ − 3² + 2³ . 5²
= ( 25 + 3 ) : 7 + 49 − 9 + 200
= 4 + 240
= 244
g) 1200 : 2 + 6² . $2^{1}$ +18+$5^{9}$:$5^{7}$ + 70 : 14 − 20
= 600 + 72 + 18 + 25 + 5 − 20
= 690 + 10
= 700
h) 3² . 5 − 2² . 7 + 83 + $5^{9}$:$5^{7}$ +12.3+$7^{0}$
= 45 − 28 + 83 + 25 + 36 + 1
= 100 + 62
= 162
Bn tham khảo nhé!!!!!!!!!!!!!!!!!!!!!!!!!!!
Xin ctlhn ạ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!