Toán Lớp 6: 1024 : 2⁵ + 140 : (38 + 2⁵) -7²³ : 7²¹
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Toán Lớp 6: 1024 : 2⁵ + 140 : (38 + 2⁵) -7²³ : 7²¹
Comments ( 2 )
=2^10 : 2^5 +140 :(38+32 )-7^(23-21)
=2^(10-5) +140:70 -7^2
=2^5 +2 -49
=32+2-49
=34-49=-15
– Áp dụng : a^m . a^n =a^(m+n)
a^m : a^n =a^(m-n)