2数乗法L1-1(6問)
次の計算をせよ。
(-2)×(+2)
解答○ ×(+3)×(-5)
解答○ ×(-4)×(-2)
解答○ ×(-3)×(-4)
解答○ ×(+1)×(-1)
解答○ ×(+7)×(+8)
解答○ ×問題と解答
(-2)×(+2)-4 (+3)×(-5)-15 (-4)×(-2)8 (-3)×(-4)12 (+1)×(-1)-1 (+7)×(+8)56
(-2)×(+2)-4 (+3)×(-5)-15 (-4)×(-2)8 (-3)×(-4)12 (+1)×(-1)-1 (+7)×(+8)56
