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
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 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)
7) 53(51+4)+53(49+96)+53
8)42(15+96)+6(25+4).7
9) 45(13+78)+9(87+22).5
10) 16(27+75)+8(53+25).2
giúp mik nhé các bạn mong các bạn giúp đỡ
5) 24*(15+49)+12*(50+42)
=24*64+12*92
=24*64+12*2*46
=24*64+24*46
=24*(64+46)
=24*110
=2640
7) 53*( 51+4)+53*(49+96)+53
=53*55+53*145+53
=53*(55+145)+53
=53*200+53
10600+53
=10653
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:
\(a)\)\(15.\left(27+18+6\right)+15.\left(23+12\right)\)
\(=\)\(15.51+15.35\)
\(=\)\(15.\left(51+35\right)\)
\(=\)\(15.86\)
\(=\)\(1290\)
\(b)\)\(24.\left(15+49\right)+12.\left(50+42\right)\)
\(=\)\(24.64+12.92\)
\(=\)\(1536+1104\)
\(=\)\(2640\)
\(c)\)\(53.\left(51+4\right)+53.\left(49+96\right)+53\)
\(=\)\(53.55+53.145+53\)
\(=\)\(53.\left(145+55+1\right)\)
\(=\)\(53.201\)
\(=\)\(10653\)
\(d)\)\(42.\left(15+96\right)+6.\left(25+4\right).7\)
\(=\)\(42.\left(15+96\right)+42.\left(25+4\right)\)
\(=\)\(42.111+42.29\)
\(=\)\(42.140\)
\(=\)\(5880\)
Bài 2;
a, 15* ( 27 + 18 +6) + 15 *( 23+12)
b, 24 * (15 +49) +12 *( 50 + 42)
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
bài 1: tính nhanh
14.35.5+10.25.7+20.70
15.(27+18+6) + 15.(23+12)
24.15+49) + 12.(50+42 )
10.(81+19) + 100 + 50 .(91+9)
53.(51 +4) +53 .( 49+96) 53
nói chung là lên gg mà sợt;vvv
Tính nhanh.
a,15.37.4+120.21+21.5.12
b,15(27+18+6) + 15(23+12)
c,10(81 + 19) +100 + 50( 91+ 9)
d,42(15 + 6) + 6(25 +4).7
a,15.37.4+120.21+21.5.12
=60.(37+42+21)
=60.100
=6000
b,15(27+18+6) + 15(23+12)
=15(27+18+6+12)
=15.63
=945
c,10(81 + 19) +100 + 50( 91+ 9)
=100.(10+1+50)
=100.61
=6100
d,42(15 + 6) + 6(25 +4).7
=42.(15+6+25+4)
=42.50
=2100
~~~~~~~~~~~ai đi ngang qua nhớ để lại k ~~~~~~~~~~~~~
~~~~~~~~~~~~ Chúc bạn sớm kiếm được nhiều điểm hỏi đáp ~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~ Và chúc các bạn trả lời câu hỏi này kiếm được nhiều k hơn ~~~~~~~~~~~~
Tính nhanh.
a,15.37.4+120.21+21.5.12
b,15(27+18+6) + 15(23+12)
c,10(81 + 19) +100 + 50( 91+ 9)
d,42(15 + 96) + 6(25 +4).7
a) 15.37.4 + 120.21 + 21.5.12
= 60 . 37 + 2.60.21 + 60 . 21
= 60 (37 + 42 + 21)
= 60 x 100 = 6000
b) 15.(27 + 18 + 6) + 15 . (23 + 12)
= 15 . (27 + 18 + 6 + 23 + 12)
= 15 x 86
=1290
c) 10 x (81 + 19) + 100 + 50 x (91 + 9)
= 10 x 100 + 100 + 50 x 100
= 100 x (10 + 1 + 50)
= 100 x 61 = 6100
d) 42 x (15 + 96) + 6 x (25 + 4) x 7
= 42 x (15 + 96) + 42 x (25 + 4)
= 42 x (15 + 96 + 29)
= 42 x 140 =5880