1.Tính :
a) 135 + 65 x 15 – 9898 : 98
b) 19,35 x 99 + 19,35
c) 215 x 15 + 31 x 45 – 6363 : 63.
Mik cần gấp giúp mik nha!!!
1.Tính :
a) 135 + 65 x 15 – 9898 : 98
b) 19,35 x 99 + 19,35
c) 215 x 15 + 31 x 45 – 6363 : 63.
Mik cần gấp giúp mik nha!!!
a) 135 + 65 . 15 – 9898 : 98
= 135 + 975 – 101
= 1110 – 101
= 1009
b) 19,35 . 99 + 19,35
= 19,35 . (99 + 1)
= 19,35 . 100
= 1935
b) 215 . 15 + 31 . 45 – 6363 : 63
= 3225 + 1395 – 101
= 4620 – 101
= 4519
Chúc học tốt!!!
$\text{a) 135 + 65 × 15 – 9898 ÷ 98.}$
$\text{= 135 + 975 – 101.}$
$\text{= 1110 – 101.}$
$\text{= 1009.}$
$\text{b) 19,35 × 99 + 19,35.}$
$\text{= 19,35 × 99 + 19,35 × 1.}$
$\text{= 19,35 × (99 + 1).}$
$\text{= 19,35 × 100.}$
$\text{= 1935.}$
$\text{c) 215 × 15 + 31 × 45 – 6363 ÷ 63.}$
$\text{= 215 × 15 + 31 × 3 × 15 – 6363 ÷ 63.}$
$\text{= 215 × 15 + 93 × 15 – 6363 ÷ 63.}$
$\text{= (215 + 93) × 15 – 6363 ÷ 63.}$
$\text{= 308 × 15 – 6363 ÷ 63.}$
$\text{= 4620 – 101.}$
$\text{= 4319.}$
$\text{Cho anh xin câu trả lời hay nhất, 5 sao và cảm ơn}$