1.257*26.5+12.57*7.25+1.257
7.707 +1.923 +2.214 +1.537 +3.132+ 2.704+ 2.704+ 1.257+ 4.051 +8.184 +4.072 +0.939 +1.884 +1.007 +4.466 +0.333+ 0.341 +13.244 +0.198 +3.926 +1.98 +2.212+ 2.219 +1.983 +1.562 +1.734 +6.788 +6.788 +2.332 +4.125 +8.192+ 5.411 +0.789 +0.78 +0.329 +6.522+ 0.198+ 2.019+ 1.971+ 2.127+ 3.432+ 21.353+ 5.887+ 4.688 +2.01 +4.282 +0.362 +26.283 +2.905 +1.5 +1.587+ 1.938 +1.802 +2.383 +2.372+ 5.498+ 1.8+ 0.675+ 0.536+ 1.481+ 11.39
Tinh nhanh :12.57+57.15+63.15
12,57 + 57,15 + 63,15
= 12,57 + (57,15 + 63,15)
= 12,57 + 120,3
= 132,87
\(12.57+57.15+63.15\)
\(=12.57+15.\left(57+63\right)\)
\(=12.57+15.120\)
\(=12.57+15.10.12\)
\(=12.57+150.12\)
\(=12.\left(57+150\right)\)
\(=12.207\)
\(=2484\)
12.57+57.15+63.15
=12.57+15.(57+63)
=12.57+15.120
=12.(57+150)
=12.207=2484
57.43+12.57 +55.43 giúp mình voi cảm ơn
57.43 + 12.57 + 55.43
= [57.43 + 12.57] + 55.43
= 70.00 + 55.43
= 125.43
tính nhanh:
a) 34 . 15 + 34 . 85
b) 12 . 57 + 57 . 25 + 63 . 57
c) 36 . 28 + 36 . 82 + 64 . 69 + 64 . 41
d) 2 . 31 . 12 + 4 . 6 . 42 + 8 . 27 . 3
Tính nhanh:
a) 34.15 + 34.85
b) 12.57 + 57.25 + 63.57
c) 36.28 + 36.82 + 64.69 + 64.41
d) 2.31.12 + 4.6.42 + 8.27.3
a) 34.15 + 34.85 = 34.(15+85) = 34.100 = 3400
b) 12.57 + 57.25 + 63.57 = 57.(12+25+63) = 57.100 = 5700
c) 36.28 + 36.82 + 64.69 + 64.41 = 36.(28+82) + 64(69+41) = 36.110 + 64.110 = 110.(36+64) = 11000
d) 2.31.12 + 4.6.42 + 8.27.3 = 24.31 + 24.42 + 24.27 = 24.(31+42+27) = 24.100 = 2400
áp dụng tính chất phân phối của phép nhân và cộng để tính nhanh phép tính 12.57+57.15+63.57 nhanh mik tick cho !!!
\(...=57.\left(12+15+63\right)=57.90=5130\)
\(12.57+57.15+63.57\\ \Rightarrow57.\left(12+15+63\right).\\ \Rightarrow57.90=5130.\)
12.57+57.15+63.75
=57.(12+15+63)
=57.90
=5130
Tinh bang cach thuan tien nhat a. 8,75+4.65+2.25 b.(4.91+12.57)+(5.09+7.43)
Giup mk nha ^^
Trả lời :
a, 8,75 + 4,65 + 2,25 = (8,75 + 2,25) + 4,65 = 11 + 4,65 = 15,65
b, (4,91 + 12,57) + (5,09 + 7,43) = (4,91 + 5,09) + (12,57 + 7,43) = 10 + 20 = 30
~Std well~
#Dương
Rút gọn: 7 . 25 - 49 7 . 24 + 21
57.72:3.7*4.2-38.16
(17.04+9.06):7.25
\(57,72:3,7\times4,2-38,16=65,62-38,16=27,36\)
\(\left(17,04+9,06\right):7,25=26,1:7,25=3,6\)