× ÷ ×268×
8× ÷ 5× 5÷
÷3= ×26= 4÷ = 0.5× =
5× = ÷ = × = × =
比
最简单的整数比
比值
:
120:72
2.1:6.3
① ÷ ÷
②( + )×35
③( - )×
④ × ×
⑤ × ÷
⑥ + ×
“小刚从家出发向东走300m后向东偏北45°走250m,最后向东走400m到达学校。”