Tính nhanh :
58x42+32.8x5.16
(42x43+43x57) - 360 : 4
456 : 2 x 18 + 456 :3 - 102
Tinh nhanh :
58x42+32.8x5.16
(42x43+43x57) - 360 : 4
456 : 2 x 18 + 456 :3 - 102
(42x43+43x57+43)-360:4
456:2x18+456:3-102
tính nhanh
( 42 x 43 + 43 x 57 + 43 ) - 360 : 4
= ( 42 x 43 + 43 x 57 + 43 x 1 ) - 90
= 43 x ( 42 + 57 + 1 ) - 90
= 43 x 100 - 90
= 4300 - 90
= 4210
456 : 2 x 18 + 456 : 3 - 102
= 456 x 9 + 456 x 1/3 - 102
= 456 x ( 9 + 1/3 ) - 102
= 456 x 28/3 - 102
= 4256 - 102
= 4154
(42x43+43x57+43)-360:4
=43x(42+57+1)-90
=4300-90
=4210
456:2x18+456:3-102
=4154
=(42x43+43x57+43)-360:4
=(42x43+43x57+43x1)-360:4
=43x(57+42+1)-360x4
=43.100-360x4
=4300-1440
=2860
1) tính nhanh
64x25+25x25+25
58x42+32x8+5x16
42x43+43x57+43)-360:4
372-19x4)+(981:9-13)
1) tính nhanh
cau 1 :64x25+25x25+25
cau 2 :58x42+32x8+5x16
cau 3 :42x43+43x57+43)-360:4
cau 1 :372-19x4)+(981:9-13)
tính nhanh : (42x43+43x57+43)-360:4
`@` `\text {Ans}`
`\downarrow`
\((42 \times 43+43 \times 57+43)-360 \div 4\)
`= 43 \times (42 + 57 + 1) - 90`
`= 43 \times 100 - 90`
`= 4300 - 90`
`= 4210`
tính nhanh
48x 32+32x8+5x16
( 42x43+43x57+43) - 360 : 4
(42x43+43x57+43)-360:4=(43x(42+57+1))-90
=(43x100)-90
=4300-90
=4210
58x42+32x8+5x16
456:2 x 18 +456:3 -102
(254x399-145) : (254+399x253)
(5932 + 6001 x 5931) : ( 5932 x 6001 - 69)
58 x 42 + 32 x 8 + 5 x 16
= 2436 + 256 + 80
= 2692 + 80
= 2772
456 : 2 x 18 + 456 : 3 - 102
= 228 x 18 + 152 - 102
= 4104 + 152 - 102
= 4256 - 102
= 4154
( 254 x 399 - 145 ) : ( 254 + 399 x 253 )
= ( 101346 - 145 ) : ( 254 + 100947 )
= 101201 : 101201
= 1
( 5932 + 6001 x 5931 ) : ( 5932 x 6001 - 99 )
= ( 5932 + 35591931 ) : ( 35597932 - 99 )
= 35597863 : 35597833
= \(\frac{35597863}{35597833}=1,000000843\)
Tính nhanh
a) ( 42 x 43 + 43 x 57 + 43 ) - 360 : 4
b) ( 372 - 19 x 4 ) + ( 981 : 9 - 13 )
c) 456 : 2 x 18 + 456 : 3 - 102
a) \(\left(42\times43+43\times57+43\right)-360:4\)
\(=43\times\left(42+57+1\right)-90\)
\(=43\times100-90\)
\(=4300-90\)
\(=4210\)
b) \(\left(372-19\times4\right)+\left(981:9-13\right)\)
\(=\left(4\times93-19\times4\right)+\left(109-13\right)\)
\(=4\times\left(93-19\right)+109-13\)
\(=4\times74+109-13\)
\(=296+109-13\)
\(=392\)
c) \(456:2\times18+456:3-102\)
\(=456\times\frac{1}{2}\times18+456\times\frac{1}{3}-102\)
\(=456\times\left(\frac{1}{2}\times18+\frac{1}{3}\right)-102\)
\(=456\times\left(9+\frac{1}{3}\right)-102\)
\(=456\times\frac{28}{3}-102\)
\(=4256-102\)
\(=4154\)
ko bk tính nhanh!
a)( 42 x 43 + 57+43 ) - 360 :4 b) (372 - 19 x 4 ) + ( 981 : 9 - 13 )
= 43 x (42 + 57 +1 ) - 90 = (372 - 76 ) + ( 109 - 13)
= 43 x 100 - 90 = 296 + 96
= 4300 - 90 = 392
= 4210
( 42 x 43 + 43 x 57 + 43 ) - 360 : 4
(372 - 19 x 4 + ( 981 : 9 - 13 )
456 : 2 x 18 + 456 : 3 - 102
phép tính này có quy tắc :
nhân chia trước, cộng trừ sau.
trong ngoặc trc ngoài ngoặc sau
tíc mình nha
(42 x 43 + 43 x 57 + 43) - 360 : 4
= 4426549 - 360 : 4
= 4426549 - 90
= 4426459
(372 - 19 x 4 + (981 : 9 - 13)
= 296 + 96
= 392
456 : 2 x 18 + 456 : 3 - 102
= 4104 + 50
= 4154
>_< học tốt
(42*43+43*57+43)-360:4
=42*43+43*57+43*1 -360:4
= 43*(42+57+1)-360:9
=43*100-90
Tính nhanh :
a , ( 42 x 43 + 43 x 57 + 43 ) - 360 : 4
b , 372 - 19 x 4 - 981 : 9 - 13
c , 456 : 2 x 18 - 456 : 3 - 102
Ai trả lời đúng , đầy đủ thì mk tk cho 4 tk !
= [43 x ( 42 + 57 + 1)] - 90
= (43 x 100) -90
= 4300 - 90
= 4210
a,( 42 x 43 + 43 x 57 + 43 ) - 360 : 4
= [ 43 x ( 42 + 57 + 1 ) ] - 90
= [ 43 x 100 ] - 90
= 4300 - 90
= 4210
b, 372 - 19 x 4 - 981 : 9 - 13
= 372 - 76 - 109 - 13
= 174
c, 452 : 2 x 18 - 456 : 3 - 102
= 226 x 18 - 152 - 102
= 4068 - 152 - 102
= 3814
a. ( 42 x 43 + 43 x 57 + 43 ) - 360 : 4 b. 372 - 19 x 4 - 981 : 9 - 13
= ( 42 x 43 + 43 x 57 + 43 x 1 ) - 360 : 4 = 372 - 76 - 109 - 13
= ( 43 x ( 42 + 57 + 1 ) ) - 360 : 4 = 296 - 109 - 13
= ( 43 x 100 ) - 360 : 4 = 187 - 13
= 4300 - 360 : 4 = 174
= 4300 - 90
= 4210
c. 456 : 2 x 18 - 456 : 3 - 102
= 228 x 18 - 152 - 102
= 4104 - 152 - 102
= 3952 - 102
= 3850