Mathematics
Junior High
Resolved
正負の数の四則混合の問題です
四角15 (7)がわかりません
15 次の計算をしなさい。
(1) -12+(-9X3+8)+11
(3) (+5)×(3-7)-(+3)²×(-4)
(5) -24÷(-8+5)
(7) -{+4-(-5+1)×7}×(+8)
(2) +29×{+4+6×(−3)+13}
(4) +100+{-10+3×(-5)}
(6) -(+9-3) X5+(-3²)×7
(8) -20÷{3×(-5)+7x2}-25 (+X
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