Tính: 976 x 76 + 23 x 976 + 976
Đặt tính rồi tính:
546 + 328 976 – 659 215 x 4 574 : 7
Tìm x biết: 549 + x = 976.
A. x = 427
B. x = 327
C. x = 437
D. x = 337
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Tìm x biết: 549 + x = 976.
A. x = 427
B. x = 327
C. x = 437
D. x = 337
Tìm x biết: 549 + x = 976.
A. x = 427
B. x = 327
C. x = 437
D. x = 337
Tính nhanh:
a) 2 x 31 x 12 + 4 x 6 x 42 + 8 x 27 x 3
b) 583 x 931 + 69 x (170 + 583) + 31 x 170
c) 732 x 976 + 24 x (680 + 732) + 76 x 680
\(a,2\times31\times12+4\times6\times42+8\times27\times3\)
\(=24\times31+24\times42+24\times27\)
\(=24\times\left(31+42+27\right)\)
\(=24\times100\)
\(=2400\)
\(b,583.931+69.\left(170+583\right)+31.170\)
\(=583.931+69.170+69.583+31.170\)
\(=583.\left(931+69\right)+170.\left(69+31\right)\)
\(=583.1000+170.100\)
\(=583000+17000\)
\(=600000\)
\(c,732.976+24.\left(680+732\right)+76.680\)
\(=732.976+24.680+24.732+76.680\)
\(=732.\left(976+24\right)+680.\left(24+76\right)\)
\(=732.1000+680.100\)
\(=732000+68000\)
\(=800000\)
Học tốt
a)2400
b)600000
c)800000
a) 2 x 31 x 12 + 4 x 6 x 42 + 8 x 27 x 3
= 24 x 31 + 24 x 42 + 24 x 27
= 24 x ( 31 + 42 + 27 )
= 24 x 100
= 2400
b) 583 x 931 + 69 x ( 170 + 583 ) + 31 x 170
= 583 x 931 + 69 x 170 + 69 x 583 + 31 x 170
= 583 x ( 931 + 69 ) + 170 x ( 69 + 31 )
= 583 x 1000 + 170 x 100
= 583000 + 17000
= 600000
c) 732 x 976 + 24 x ( 680 + 732 ) + 76 x 680
= 732 x 976 + 24 x 680 + 24 x 732 + 76 x 680
= 732 x ( 976 + 24 ) + 680 x ( 24 + 76 )
= 732 x 1000 + 680 x 100
= 732000 + 68000
= 800000
700 x 800 : 2 + 100000 - 976 x ( 2 + 78 ) =......
=560000:2+1000-976x(2+78)
=280000+1000-976x(2+78)
=281000-976x(2+78)
=280024x(2+78)
=280024x80
=22401920
700 x 800 : 2 + 100000 - 976 x ( 2 + 78 )
= 560000 : 2 + 1000 - 976 x 80
= 280000 + 100000 - 976 x 80
= 280000 + 100000 - 78080
= 380000 - 78080
= 301920
a) 178 593 + x nhân 5 = 427 158
b) 976 318 - x : 2 = 764 280
a, 178 593 + 5x = 427 158
5x = 427 158 - 178 593
5x = 248 565
x = 248 565 : 5
x = 49 713
b, 976 318 - x : 2 = 764 280
x : 2 = 976 318 - 764 280
x : 2 = 212 038
x = 212 038 x 2
x = 424 076
a) 178593 + x × 5 = 427158
=> 5x = 427158 - 178593
5x = 248565
=> x = 248565 : 5
x = 49713
b) 976318 - x : 2 = 764280
=> - x : 2 = 764280 - 976318
- x : 2 = - 212038
=> x = - 212038 × (-2)
x = 424076
Tính hợp lý : (2023.2025-976) :(2023.2024+1047)
\(\left(2023\cdot2025-976\right):\left(2023\cdot2024+1047\right)\)
\(\left(2023\cdot2024+2023-976\right):\left(2023\cdot2024+1047\right)\)
\(2023-976+1047\)
\(2023+1047-976\)
\(3070-976\)
\(2094\)
Tính bằng cách thuận tiện nhất :
(976 + 865) + 135 = ………………….
(976 + 865) + 135 = 976 + (865 + 135)
= 976 + 1000 = 1976