tính bằng cách thuận tiện
a)76,58+25,44+24,56
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b)23,43+28,48+21,52+56,57
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a) \(76,58+25,44+24,56\)
\(=76,58+\left(25,44+24,56\right)\)
\(=76,58+50\)
\(=126,58\)
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b) \(23,43+28,48+21,52+56,57\)
\(=\left(23,43+56,57\right)+\left(28,48+21,52\right)\)
\(=80+50\)
\(=130\)
a) 76,58 + 25,44 + 24,56
= 76,58 + 50 = 126,58
a) 76,58 + 25,44 + 24,56
= 76,58 + (25,44 + 24,56)
= 76,58 + 50
= 126,58
b) 23,43 + 28,48 + 21,52 + 56,57
= (23,43 + 56,57) + (28,48 + 21,52)
= 80 + 50
= 130
a)76,58+25,44+24,56
=76,58+(25,44+24,56)
=76,58+50
=126,58
b)23,43+28,48+21,52+56,57
=(23,43+56,57)+(28,48+21,52)
=80+50
130
