真的?
① -6÷(-3×2)
= -6 ÷ (-6)
= 1
② 17-8÷(-2)+4×(-3)
= 17 - (-4) + (-12)
= 17 + 4 - 12
= 9
③3^2-50÷(-2)^2×(+0.1)-1
= 9 - 50 ÷ 4 × 0.1 - 1
= 8 - 12.5 × 0.1
= 8 - 1.25
= 6.75
真的?
① -6÷(-3×2)
= -6 ÷ (-6)
= 1
② 17-8÷(-2)+4×(-3)
= 17 - (-4) + (-12)
= 17 + 4 - 12
= 9
③3^2-50÷(-2)^2×(+0.1)-1
= 9 - 50 ÷ 4 × 0.1 - 1
= 8 - 12.5 × 0.1
= 8 - 1.25
= 6.75