X:11+1358=1456
Tính nhanh : 15 x 1358 + 590 x 358 + 85 x 1358 - 490 x 179 x 2.
=1358 x (15+85)+358x(590-490)
=1358x100+358x100
=100x(1358+358)
=100x1716
=171600
= 1358 x ( 15 + 85) + 358 x ( 590 - 490)
= 1358 x 100 + 358 x 100
= 100 x ( 1358 + 358 )
= 100 x 1716 = 171600
a) 15 x 1358 + 590 x 358 + 85 x 1358 - 490 x 358
b) 9,3 x 45 + 9,3 x 5,7 - 18,6
a) 15 x 1358 + 590 x 358 + 85 x 1358 - 490 x 358
=15 x 1358 + 85 x 1358 + 590 x 358 - 490 x 358
=1358x(15+85)+358x(590-490)
=1358x100+358x100
=135800+35800
=171600
b) 9,3 x 45 + 9,3 x 5,7 - 18,6
=9,3x(45+5,7)-18,6
=9,3x50,7-18,6
=471,51-18,6
=452,91
15x1358+590x358+85x1358-490x358
=(15x1358+85x1358) + (590x358-490x358)
=1358x(15+85) + 358x(590-490)
=1358x100+358x100
=135800+35800
=171600
a) 15 x 1358 + 590 x 358 + 85 x 1358 - 490 x 358
= 1358 x ( 15 + 85 ) + 358 x ( 590 - 490 )
= 1358 x 100 + 358 x 100
= 100 x ( 1358 + 358 )
= 100 x 1716
= 171 600
b) 9,3 x 45 + 9,3 x 5,7 - 18,6
= 9,3 x 45 + 9,3 x 5,7 - 9,3 x 2
= 9,3 x ( 45 + 5,7 - 2 )
= 9,3 x 48,7
= 452,91
Học tốt nhé bạn !
a) x + 678 = 7818
b) 4029 + x = 7684
c) x – 1358 = 4768
a)\(x+678=7818\)
\(x=7818-678=7140\)
b)\(4029+x=7684\)
\(x=7684-4029=3655\)
c)\(x-1358=4768\)
\(x=4768+1358=6126\)
\(a,x+678=7818\)
\(x=7818-678\)
\(x=7140\)
\(b,4029+x=7684\)
\(x=7684-4029\)
\(x=3655\)
\(c,x-1358=4768\)
\(x=4768+1358\)
\(x=6126\)
96 x 6 + 1456 =
96 * 6 + 1456
= 576 + 1456
= 2032
Vậy 96 * 6 + 1456 = 2032
Đúng 100%
Tính nhanh 1 : 15 * 1358 + 590 + 85 * 1358 - 490 *179 *2
1456+ x :6=678+9
1456+x:6=678+9
1456+x:6=687
(1456+x):6=687
1456+x=687x6
1456+x=4122
x=4122-1456
x=2666
nhớ k nhé
1456+x:6=678+9 1456+x:6=687 x:6=1456-687 x:6=769 x=769x6 x=4614 Vậy x= 4614
-1456 -(137 -1456) -63
-1456-(137-1456)-63
=-1456-137+1456-63
=0-137-63
=-137-63
=-200
tìm b
b x 5 + b x 2 =1456
b x 5 + b x 2 = 1456
b x ( 5 + 2 ) = 1456
b x 7 = 1456
b = 1456 : 7
b = 208
bx5+bx2=1456
=> bx(5+2)=1456
=> bx7=1456
=> b = 1456 :7
=> b = 208
bx5+bx2=1456
=>bx(5+2)=1456
=>bx7=1456
=>b=1456:7
=>b=208
(có thể bỏ dấu suy ra)
Đặt tính rồi tính :
1456 + 1651 87965 - 4108 2167 x 6 96267: 3