a.28×34+28×66 b.25×5×4×2×29 c.12×25+12×14+39×88 f.24×14+24×39+76×18+76×35 13/08/2021 Bởi Anna a.28×34+28×66 b.25×5×4×2×29 c.12×25+12×14+39×88 f.24×14+24×39+76×18+76×35
$Đáp án: a/ $2800$ b/ $29000$ c/ $3900$ f/ $5300$ Giải thích các bước giải: a/ $28$ x $34+28$ x $66$ $=28$ x $(34+66)$ $=28$ x $100$ $=2800$ b/ $25$ x $5$ x $4$ x $2$ x $29$ $=(25$ x$ 4)$ x $(5$ x $2)$ x $29$ $=100$ x $10$ x $29$ $=1000$ x $29$ $=29000$ c/ $12$ x $25+12$ x $14+39$ x $88$ $=12$ x $(25+14)+39$ x $88$ $=12$ x $39+39$ x $88$ $=39$ x $(12+88)$ $=39$ x $100$ $=3900$ f/ $24$ x $14+24$ x $39+76$ x $18+76$ x $35$ $=24$ x $(14+39)+76$ x $(18+35)$ $=24$ x $53+76$ x $53$ $=53$ x ($24+76)$ $=53$ x $100$ $=5300$ Chúc bạn học tốt !!! Bình luận
Đáp án: Giải thích các bước giải: a) 28×34+28×66 = 28×(34 + 66) = 28 × 100 = 2800 b) 25 × 5 × 4× 2 × 29 = 25 × 4 × 5 × 2 × 29 = 100 × 10 × 29 = 29000 c) 12 × 25+12 × 14 + 39 × 88 = 12 × ( 25 + 14 ) + 39 × 88 = 12 × 39 + 39 × 88 = 39 × (12+88) = 39 × 100 = 3900 d) 24×14+24×39+76×18+76×35 = 24 × ( 14 + 39) + 76 × ( 18 + 35) = 24 × 53 + 76 × 53 = 53 × (24 + 76) = 53 × 100 = 5300 Bình luận
$Đáp án:
a/ $2800$
b/ $29000$
c/ $3900$
f/ $5300$
Giải thích các bước giải:
a/ $28$ x $34+28$ x $66$
$=28$ x $(34+66)$
$=28$ x $100$
$=2800$
b/ $25$ x $5$ x $4$ x $2$ x $29$
$=(25$ x$ 4)$ x $(5$ x $2)$ x $29$
$=100$ x $10$ x $29$
$=1000$ x $29$
$=29000$
c/ $12$ x $25+12$ x $14+39$ x $88$
$=12$ x $(25+14)+39$ x $88$
$=12$ x $39+39$ x $88$
$=39$ x $(12+88)$
$=39$ x $100$
$=3900$
f/ $24$ x $14+24$ x $39+76$ x $18+76$ x $35$
$=24$ x $(14+39)+76$ x $(18+35)$
$=24$ x $53+76$ x $53$
$=53$ x ($24+76)$
$=53$ x $100$
$=5300$
Chúc bạn học tốt !!!
Đáp án:
Giải thích các bước giải:
a) 28×34+28×66 = 28×(34 + 66) = 28 × 100 = 2800
b) 25 × 5 × 4× 2 × 29 = 25 × 4 × 5 × 2 × 29 = 100 × 10 × 29 = 29000
c) 12 × 25+12 × 14 + 39 × 88
= 12 × ( 25 + 14 ) + 39 × 88
= 12 × 39 + 39 × 88 = 39 × (12+88)
= 39 × 100 = 3900
d) 24×14+24×39+76×18+76×35
= 24 × ( 14 + 39) + 76 × ( 18 + 35)
= 24 × 53 + 76 × 53
= 53 × (24 + 76)
= 53 × 100
= 5300