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24 x 55 + 12 x 88 + 24
= ( 24 x 55 ) + ( 12 x 88 ) + 24
= 1320 + 1056 + 24
= 2376 + 24
= 2400
_HT_
\(24\cdot55+12\cdot88+24\)
\(\Leftrightarrow\left(24\cdot55\right)+\left(24\cdot88:2\right)+24\)
\(\Rightarrow\left(24+55\right)+\left(24\cdot44\right)+24\)
\(\Leftrightarrow24\left(55+44+1\right)\)
\(\Leftrightarrow24\cdot100\)
\(\Leftrightarrow2400\)
=(12+88) +(34+46)*2+(55+65)=100+2*80+120=100+160+120=380
Hướng dẫn giải:
a) 513 x 4 + 513 x 6
= 513 x (4 + 6)
= 513 x 10 = 5130
b) 88 x 9 – 88 x 8
= 88 x (9 – 8)
= 88 x 1 = 88
a) 513 x 4 + 513 x 6 = 513 x (4 + 6)
= 513 x 10
= 5 130
b) 88 x 9 - 88 x 8 = 88 x (9 - 8)
= 88 x 1
=88
50 + 30 + 60 + 40 + 50 + 70 + 120 + 80 + 215 + 85 + 95 + 5 + 12 + 73+ 27 + 88
= (50 + 50 ) + (60 + 40) + (70 + 30) + (120 + 80) + (95 + 5) + (73 + 27) + (12 + 88) + (215 + 85)
= 100 + 100 + 100 + 200 + 100 + 100 + 100 + 300
= 1100
\(\frac{8}{14}+\frac{5}{12}+\frac{6}{14}+\frac{8}{12}-\frac{1}{12}\)
\(=\left(\frac{8}{14}+\frac{6}{14}\right)+\left(\frac{5}{12}+\frac{8}{12}-\frac{1}{12}\right)\)
\(=1+1=2\)
\(\frac{8}{14}+\frac{5}{12}+\frac{6}{14}+\frac{8}{12}-\frac{1}{12}\)
\(=\left(\frac{8}{14}+\frac{6}{14}\right)+\left(\frac{5}{12}+\frac{8}{12}-\frac{1}{12}\right)\)
\(=1+1=2\)
~ Hok tốt ~
\(11+22+33+44+55+66+77+88+99\)
\(=\left(11+99\right)+\left(22+88\right)+\left(33+77\right)+\left(44+66\right)+55\)
\(=110+110+110+110+55\)
\(=550+55\)
\(=605\)
# Kukad'z Lee'z
= (88 : 8) x 12
= 11 x 12
= 132
nhầmd
( 88 x 12 ) : 8
=( 88 : 8 ) x 12
= 11 x 12
= 132