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A = 72+139+195+216
=622
B=54 x 63 + 54 x 67 - 54 x 40
= 54 x ( 63+67-40)
= 54 x 90 = 4860
A=72+139+195+216
A=(72+139)+(195+216)
A=211+411)
A=622
B=54x63+54x67-54x40
B=54x(63+67-40)
B=54x90
4860

a ) 48 , 72 - 2 , 67 - 5 , 33
= 48 , 72 - ( 2 , 67 + 5 , 33 )
= 48 , 72 - 8
= 40 , 72
b ) 94 , 21 + 20 , 32 - 44 , 21
= ( 94 , 21 - 44 , 21 ) + 20 , 32
= 50 + 20 , 32
= 70 , 32
c ) 0 , 8 x 26 , 35 x 12 , 5
= ( 0 , 8 x 12 , 5 ) x 26 , 35
= 10 x 26 , 35
= 263 , 5
d ) 56 , 32 x 78 + 21 x 56 , 32 + 56 , 32
= 56 , 32 x ( 78 + 21 + 1 )
= 56 , 32 x 100
= 563 , 2
Chúc bạn học tốt !!!
hrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
96,73 * 5348 = 517 312,04
36,98 : 5,32 = 6,95 (dư 0,60)
48,54 * 89,6 = 4349,184
998,6 : 5,3 = 188,41 (dư 2,7)
873,7 : 63 = 13,86 ( Dư 52 )
5,217 * 8,62 = 44,97054