Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
46+17+54=(46+54)+17=117
4.37.25=(4.25).37=3700
87.36+87.64=87.(36+64)=8700
\(a,46+17+54=100+17=117\)
\(b,4\cdot37\cdot25=100\cdot37=3700\)
\(b,87\cdot36+87\cdot64=87\cdot\left(36+64\right)\)
\(=87\cdot100=8700\)
ti ck nha
a,46+17+54 b,4.37.25 c,87.36+87.64
=(46+54)+17 =(4.25).37 =87.(36+64)
=100+17 =100.37 =87.100
=117 =3700 =8700
a) 46 + 17 + 54
= ( 46 + 54 ) + 17
= 100 + 17
= 117
b) 4.37.25
= (25.4).37
= 100.37
= 3700
c) 87.36 + 87.64
= 87.(36 + 64)
= 87.100
= 8700
a) 46+17+54
=(46+54)+17
=100+17
=117
b) 4.37.25
=(4.25).37
=100.37
=3700
c) 87.36+87.64
=87. (36+64)
=87.100
=8700
Tích đúng nha
a,87.36 + 87.64 = 87 . (64 + 36) = 87 x 100 = 8700
b, 91.51 + 49.163 - 49.72 = 91.51 + ( 49.163 - 49.72 ) = 91.51 + 49.91 = 91.(51+49) = 91.100 = 9100
a, 37.12=37.3.4=111.4=444
b, 15873.21= 15873. 7. 3= 111111. 3= 333333
a, Ta có: 37 . 3 = 111
mà \(12=3.4\)
\(\Rightarrow37.12=37.3.4=111.4=444\)
b, Ta có: 15873.7 = 111111
mà \(21=7.3\)
\(\Rightarrow15873.21=15873.7.3=111111.3=333333\)
Bài 3 :
A = 26 + 27 + 28 + 29 + 30 + 31 + 32 + 33
=> A = ( 33 + 26 ) . 8 : 2 = 236
Vậy A = 236
\(\text{#Hok tốt!}\)
a) 2 . 31 . 12 + 4 . 6 . 42 + 8 . 27 . 3
= 24 . 31 + 24 . 42 + 24 . 27
= 24 . ( 31 + 42 + 27 )
= 24 . 100
= 2400
\(\frac{-2}{5}.\left(\frac{5}{17}-\frac{9}{15}\right)-\frac{-2}{5}.\left(\frac{2}{17}+\frac{-2}{5}\right)\)
\(=\frac{-2}{5}.\frac{5}{17}-\frac{-2}{5}.\frac{3}{5}-\frac{-2}{5}.\frac{2}{17}-\frac{-2}{5}.\frac{-2}{5}\)
\(=\frac{-2}{5}.\left(\frac{5}{17}-\frac{2}{17}\right)-\frac{-2}{5}.\left(\frac{3}{5}+\frac{-2}{5}\right)\)
\(=\frac{-2}{5}.\frac{3}{17}-\frac{-2}{5}.\frac{1}{5}\)
\(=\frac{-2}{5}.\left(\frac{3}{17}-\frac{1}{5}\right)\)
\(=\frac{-2}{5}.\frac{-2}{85}\)
\(=\frac{4}{425}\)
\(\frac{-2}{5}.\left(\frac{5}{17}-\frac{9}{15}\right)-\frac{-2}{5}.\left(\frac{2}{17}+\frac{-2}{5}\right)\)
= \(\frac{-2}{5}.\frac{-26}{85}-\frac{-2}{5}.\frac{-24}{85}\)
= \(\frac{-2}{5}.\left(\frac{-26}{85}-\frac{-24}{85}\right)\)
= \(\frac{-2}{5}.\frac{-2}{85}\)
= \(\frac{4}{425}\)
Ta có:
87 . 36 + 87 . 64 = 87 . ( 36 + 64 ) = 87 . 100 = 8700