Toán Lớp 6: thực hiện phép tính:
a)23+234+77+66
b)(- 12) + (- 9) + 4
c)(15 – 2 mũ 2 x 3)+11×3 mũ 2
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Toán Lớp 6: thực hiện phép tính:
a)23+234+77+66
b)(- 12) + (- 9) + 4
c)(15 – 2 mũ 2 x 3)+11×3 mũ 2
Comments ( 2 )
= ( 23 + 77 ) + ( 234 + 66 )
= 400
b) ( -12 ) + ( -9 ) + 4
= -12 – 9 + 4
= -21 + 4
= -17
c) ( 15 – 2^2 xx 3 ) + 11 xx 3^2
= ( 15 – 4 xx 3 ) + 11 xx 9
= ( 15 – 12 ) + 99
= 3 + 99
= 102