a)64.25+35.25=25
b)58.42+32.8+5.16
c)42.43+43+57.43
d)456:2 nhân 18+456:3-102
Tính nhanh
58.42+32.8+5.16
(42.43+43.57+43)-360:4
(372-19.4)+(981:9-13)
456:2.18+456:3-102
a) (42 x 43 + 43 x 57 + 43) - 360 : 4
= 43 x ( 42 x 57) + 43 - 360 :4
= 43 x 99 + 43 - 90
= 4257 + 43 - 90
= 4300 - 90
= 4210
b) (372 - 194 x 4) + (981 : 9 - 13)
= (372 - 776) + (109 - 13)
= -404 + 96
= -308
c) 456 : 2 x 18 + 456 : 3 - 102
= 228 x 18 + 152 - 102
= 4104 + 152 - 102
= 4256 - 102
= 4154
thực hiện phép tính a)64.25+35.25+25 b)58.42+32.8+5.16 c)(42.43+43.57+43)-360=
các bn nhớ giúp mk nha! mk còn phải nộp bài cho cô rùi
a) 64.25+35.25+25
=25(64+35+1)=25.100=2500
b) 58.42+32.8+5.16
=2436+256+80=2772
c) (42.43+43.57+43)-360
=43(42+57+1)-360=43.100-360=4300-360=3940
Học tốt!
tinh nhanh:
a,64.25+35.25+25
b,92.42+32.8+5.16
c,(42.43+43.57+43)-360:4
a) \(64\cdot25+35\cdot25+25=25\cdot\left(64+35+1\right)=2500\)
b) \(92\cdot42+32\cdot8+5\cdot16\)
\(=8\cdot21\cdot23+16\left(16+5\right)\)
\(=8\cdot21\cdot23+16\cdot21\)
\(=8\cdot21\cdot\left(23+2\right)\)
\(=8\cdot21\cdot25\)
\(=2\cdot21\cdot4\cdot25\)
\(=42\cdot100\)
\(=4200\)
c) \(\left(42\cdot43+43\cdot57+43\right)-360:4\)
\(=\left[43\cdot\left(42+57+1\right)\right]-360:4\)
\(=4300-90\)
\(=4210\)
Tính nhanh:
a) (42.43+43.57+43)-360:4
b) (372 -194 .4 ) + ( 981 : 9 - 13 )
c) 456 : 2 . 18 + 456 : 3 - 102
Dấu chấm là nhân nhé !
Các bạn ơi giúp mình với mình đang cần gấp !
a) (42 x 43 + 43 x 57 + 43) - 360 : 4
= 43 x ( 42 x 57) + 43 - 360 :4
= 43 x 99 + 43 - 90
= 4257 + 43 - 90
= 4300 - 90
= 4210
b) (372 - 194 x 4) + (981 : 9 - 13)
= (372 - 776) + (109 - 13)
= -404 + 96
= -308
c) 456 : 2 x 18 + 456 : 3 - 102
= 228 x 18 + 152 - 102
= 4104 + 152 - 102
= 4256 - 102
= 4154
=
a) (42.43+43.57+43)-360:4
=4300 - (360:4)
=4300- 90
=4210
b) (372 -194 .4 ) + ( 981 : 9 - 13 )
=712 + 69
=808
c) 456 : 2 . 18 + 456 : 3 - 102
= (456 : 2 . 18) + (456 : 3 - 102)
=4104+50
=4155
k nhak
Tính hợp lí
1) 2,26,5
2) 4.37.25
3) 25.5.5.27.2
4) 28.64+28.36
5) 43+27+93.43+57.61+59.57
6) 64.6+81.4+17.6
7) (42.43+43.57+43) - 360:4
8) 58.42+32.8+5.16
1=???
2=(4x25)x37=100x37=3700
3=33750
4=28x(64+36)=28x100=2800
5=14386
6=810
7=(43x[42+57+1])-90=4300-90=4210
8=2772
a,4.37.25
=(4.25)+25
=100+25
=125
đó tui giải câu a thu
mấy câu khác dễ ợt
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) 58*42+32*8+5*16.
b) ( 42*43+43*57+43) - 360:4
c ) ( 372 -19 *4 +(981:9- 13)
d) 456:2*18+456:3-102
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