1: ⑴ 53459 1710688 1625388
⑵ 1.708 0.488 0.389
2:
285714 100
428571 1100
571428 11100
714285 111100
857142 1111100
3: ⑴ (163-160)÷160
=3÷160
=1.875%
⑵ (45-40)÷45
=5÷45
≈11.1%
⑶ 小明的体重比小华的体重重百分之几?
(45-39)÷39×100%≈15.4%
提交 重置