7: 125×0.8×3=300
8: 40×1.5÷30×365=730
8: ⑴ ﹙7.2+5.8﹚×2
=13×2
=26
⑵ ﹙7.2--5.8﹚×2
=1.4×2
=2.8
10: 7.26×2×5
=72.6
提交 重置
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