tinh nhanh
24.(15+49)+12.(50+42)
1 .Tinh nhanh :
24 x ( 15 + 49 ) + 12 x ( 50 + 42 )
2 .Dùng gợi ý xếp thành câu đúng :
You / live / house ?
24 x 15 + 24 x 49 +12 x 50 +12 x 42
= 12 x 2 x15 + 12 x 2 x 49 + 12 x 50 + 12 x 42
= 12 x ( 2 x 15 + 2 x 49 + 50 + 42 )
= 12 x 220
=2640
do you live house ?
TÍNH NHANH
24.(15+49)+12.(50+42)
không hiếu lw =)
Nhưng mà hìh như sai đề ở chỗ nào thì phải =3
**** nha ~~~
1,Tính nhanh
24.(15+49)+12.(50+42)
24.(15+49)+12(50+42)
=24.64+12.92
=24.64+24.46
=24.110=2640
24x(15+49)+12x(50+42)=24x64+12x92
= 24x 64+24x46
= 24x(64+46)
= 24x110=2640
24.(15+49)+12.(50+42)
=24.46+12.92
=24.64+24.46
=24.110=2640
tính nhanh
a)15(27+18+6)+ 15(23.12)
b) 24(15+49)+12(50+42)
tính nhanh
3) 14.35.5+10.25.7+20.7
4) 15(27+18+6)+ 15(23.12)
5) 24(15+49)+12(50+42)
6) 10(81+19)+100+50(91+9)
10(81+19)+100+50(91+9)
=10.100+100+50.100
=1000+100+5000
=6100
=14.5.35+10.5.5.7+4.5.7
=70.35+50.35+4.35
=35.(70+50+4)
=35.124
=4340
tính nhanh
3) 14.35.5+10.25.7+20.7
4) 15(27+18+6)+ 15(23.12)
5) 24(15+49)+12(50+42)
6) 10(81+19)+100+50(91+9)
Tính nhanh
13.58.4 + 32.26.2+52.10
15.34.4+120.21+21.5.12
14.35.5+10.25.7+20.70
24.( 15+49)+12.(50+42)
53.(51+4)+53.(49+96)+53
42.(15+96)+6.(25+4).7
45.(13+78)+8.(53+25).2
cọu lên gg í <<:
tính nhanh
3) 14.35.5+10.25.7+20.7
4) 15(27+18+6)+ 15(23.12)
5) 24(15+49)+12(50+42)
6) 10(81+19)+100+50(91+9)
giúp mik với ạ
Tính hợp lí
a, 15.(27+ 18 +6 ) + 15.( 23 +12)
b, 24.(15 + 49 ) + 12. ( 50 + 42 )
c, 53.(51+4)+53.(49+96) +53
d, 42.( 15 +96) +6.(25 +4).7
Tính hợp lí
a,15.(27+ 18 +6 ) + 15.( 23 +12)
= 15(27+18+6+23+12)
= 15.86
= 1290
b,24.(15 + 49 ) + 12. ( 50 + 42 )
=12.2(15+49)+12.(50+42)
= 12(30+98)+12(50+42)
=12(30+98+50+42)
=12.220
= 2640
c,53.(51+4)+53.(49+96) +53
=53(51+4)+53(49+96)+53.1
=53(51+4+49+96+1)
=53.201
=10653
d,42.( 15 +96) +6.(25 +4).7
=42(15+96)+42(25+4)
=42(15+96+25+4)
=42.140
=5880
tick đúng cho mk nha pikachu
Tính hợp lí:
\(a)\)\(15.\left(27+18+6\right)+15.\left(23+12\right)\)
\(=\)\(15.51+15.35\)
\(=\)\(15.\left(51+35\right)\)
\(=\)\(15.86\)
\(=\)\(1290\)
\(b)\)\(24.\left(15+49\right)+12.\left(50+42\right)\)
\(=\)\(24.64+12.92\)
\(=\)\(1536+1104\)
\(=\)\(2640\)
\(c)\)\(53.\left(51+4\right)+53.\left(49+96\right)+53\)
\(=\)\(53.55+53.145+53\)
\(=\)\(53.\left(145+55+1\right)\)
\(=\)\(53.201\)
\(=\)\(10653\)
\(d)\)\(42.\left(15+96\right)+6.\left(25+4\right).7\)
\(=\)\(42.\left(15+96\right)+42.\left(25+4\right)\)
\(=\)\(42.111+42.29\)
\(=\)\(42.140\)
\(=\)\(5880\)