Tính nhanh
48.19+48.115+134.52
tính nhanh:
48.19+48.115+134.52
Ta có : 48 . 19 + 48 . 115 + 134 . 52 = 48 . (19+115) + 134 . 52
= 48 . 134 + 134 .52
= (48 + 52 ) .134
= 100 . 134 = 13400
48.19+48.115+134.52
=48.(19+115)+134.52
=48.134+134.52
=134.(48+52)
=134.100
=13400
Mấy bài kiểu này không nên đăng lên đây nha bn phải suy nghĩ trc đi r ms hỏi người khác.
Tính nhanh:
a.48.19 + 48.115 + 134.52
b.27.121 - 87.27 + 73.34
c.29.38 - 29.23 + 64.71
a) 48 . 19 + 48 . 115 + 134 . 52 b) 27 . 121 - 87 . 27 + 73 . 34 c) 29 . 38 - 29 . 23 + 64 . 71
= 48 . ( 19 + 15 ) + 134 . 52 = 27 . ( 121 - 87 ) + 73 . 34 = 29 . ( 38 - 23 ) + 64 . 71
= 48 . 134 + 134 . 52 = 27 . 34 + 73 . 34 = 29 . 15 + 64 . 71
= 134 . ( 48 +52 ) = 34 . ( 27 + 73 ) = 4979
= 134 . 100 = 34 . 100
= 13400 = 3400
Phần c) mình thấy hơi sai sai đề , bạn xem lại đề nhé
48.19+48.115+134.52
48.19+48.115+134.52=48.(19+115)+134.52
=48.134+134.52
=134.(48+52)
=134.100
=13400
Học tốt nha!!!
\(48\cdot19+48\cdot115+134\cdot52\)
\(=48\cdot\left(19+115\right)+134\cdot52\)
\(=48\cdot134+134\cdot52\)
\(=134\cdot\left(48+52\right)\)
\(=134\cdot100\)
\(=13400\)
\(48.19+48.115+134.52\)
=48.(19+115)+134.52
=48.134+134.52
=134.(48+52)
=134.100
=13400
48.19+48.115+134.52
48.19 + 48.115.134.52 =
(115 + 19).48.134.52 = 134.48.134.52 = (48 + 52).134 = 100.134 = 13400
TÍNH NHANH:
a,48.19+48.115+134.52
b,27.121-87.27+73.34
c,125.98-125.46-52.25
trình bày cách giải hộ mình nhé
a,48.(19+115)+134.52=48.134+134.52=134.(48+52)=134.100=13400
b,27.(121-87)+73.364=27.34+73.34=34.(73+27)=34.100=3400
c,125.(98-46)-52.25=125.52-52.25=25.(125-25)=25.100=2500
tick nha
Tính nhanh:
A) 58.75+58.50-58.25
B) 27.39+27.63-2.27
C) 128.46+128.32+128.22
D) 12.35+35.182-35.94
E) 48.19+48.115+134.52
F) 136.23+136.17-40.36
G) 17.93+116.83+17.23
H) 19.27+47.81+19.20
I) 87.23+13.93+70.87
Áp dụng công thức này là được :
m.a+m.b+m.c = m(a+b+c)
a) 58.75 + 58.50 - 58.25
= 58. (75 + 50 - 25)
= 58. 100
= 5800
b) 27.39 + 27.63 + 2.27
= 27. (39 + 63 - 2)
= 27. 100
= 2700
c) 128.46 + 128.32 + 128.22
= 128.(46 + 32 + 22)
= 128. 100
= 12800
d) 12.35 + 35.182 - 35.94
= 35.(12 + 182 - 94)
= 35. 100
= 3500
e) 48.19 + 48.115 + 134.52
= 48.(19 + 115) + 134.52
= 48.134 + 134.52
= 134.(48 + 52)
= 134.100
= 13400
f) 136.23 + 136.17 - 40.36
= 136.(23 + 17) - 40.36
= 136.40 - 40.36
= 40.(136 - 36)
= 40.100
= 4000
g) 17.93 + 116.83 + 17.23
= 17.(93 + 23) + 116.83
= 17.116 + 116.83
= 116.(17 + 83)
= 116.100
= 11600
h) 19.27 + 47.81 + 19.20
= 19.(27 + 20) + 47.81
= 19.47 + 47.81
= 47.(19 + 81)
= 47.100
= 4700
i) 87.23 + 13.93 + 70.87
= 87.(23 + 70) + 13.93
= 87.93 + 13.93
= 93.(87 + 13)
= 93.100
= 9300
#NgHn
Bài tập:Tính nhanh:
a 27.39+27.63-2.27
b 66.25+5.66+66.14+33.66
c 136.23+136.17-40.36
d 48.19+48.115+134.52
a)27.39+27.63-2.27
=27.(39+63-2)
=27.100
=2700
b) 66.25+5.66+66.14+33.66
=66.(25+5+14+33)
=66.77
=5082
c) 136.23+136.17-40.36
=136.(23+17)-40.36
=136.40-40.36
=40.(136-36)
=40.100
=4000
d) 48.19+48.115+134.52
=48.(19+115)+134.52
=48.134+134.52
=134.(48+42)
=134.100
=13400
1. tính
a. 48.19+48.115+134.52
b. 27.121-87.27+73.34
a, 48.19 + 48.115 + 134.52
= 48 . ( 19 + 115 ) + 134.52
= 48 . 134 + 134 . 52
= 134 . ( 48 + 52 )
= 134 . 100
= 13400
b, 27 . 121 - 87 . 27 + 73 . 34
= 27 . ( 121 - 87 ) + 73 . 34
= 27 . 34 + 73 . 34
= 34 . ( 27 + 73 )
= 34 . 100
= 3400
a, 48 . 19 + 48 . 115 + 134 . 52
= 48 . ( 19 + 115 ) + 134 . 52
= 48 . 134 + 134 . 52
= ( 48 + 52 ) . 134
= 100 . 134
= 13400
b, 27 . 121 - 87 . 27 + 73 . 34
= 27 . ( 121 - 87 ) + 73 . 34
= 27 . 34 + 73 . 34
= ( 27 + 73 ) . 34
= 100 . 34
= 3400
1.a.48.19+48.115+134.52=48.(19+115)+134.52
=48.134+134.52
=134.(52+48)
=134.100=13400
1.b 27.121-87.27+73.34=27.(181-87)+73.34
=27.34+73.34
=(27+73).34
=100.34=3400
Đề bài : Tính nhanh
a) 35.34+35.86+65.75+65.75
b) 3.25.8+4.37.6+2.38.12
c) 66.25+5.66+66.14+33.66
d) 48.19+48.115+134.52
MN GIÚP MK VS MIK ĐANG CẦN GẤP
a, 35.34 + 35.86 + 65.75 + 65.75
= 35.(34 + 86) + 75.(65 + 65)
= 35.120 + 75.130
= 4200 + 9750
= 13950
b, 3.25.8 + 4.37.6 + 2.38.12
= 24.25 + 24.37 + 24.38
= 24.(25 + 37 + 38)
= 24. 100
= 2400
c,66.25 + 5.66 + 66.14 + 33.66
= 66 . (25 + 5 + 14 + 33)
= 66 .77
=5082
d, 48 .19 + 48.115 + 134.52
= 48 . (19 + 115) + 134.52
= 48 . 134 + 134.52
= 134 . (48 + 52)
= 134 . 100
= 13400
35.34+35.85+75+65.75
=13950
3.25.8+4.37.6=2.38.12
=2400
66.25+5.66+66.14+33.66
=5082
48.19=48.115+134.52
=13400
hok tốt
35.34+35.85+75+65.75
=13950
3.25.8+4.37.6=2.38.12
=2400
66.25+5.66+66.14+33.66
=5082
48.19=48.115+134.52
=13400
hok tốt