先估一估下列图形的面积哪个大,再算一算,比一比
\u5148\u4f30\u4e00\u4f30\u4e0b\u5217\u56fe\u5f62\u7684\u9762\u79ef\u54ea\u4e2a\u5927\uff0c\u518d\u7b97\u4e00\u7b97\uff0c\u6bd4\u4e00\u6bd4132\u00d783=10956\uff08\u5e73\u65b9\u5398\u7c73\uff09\uff0c98\u00d798=9604\uff08\u5e73\u65b9\u5398\u7c73\uff09\uff0c10956-9604=1352\uff08\u5e73\u65b9\u5398\u7c73\uff09\uff0c\u7b54\uff1a\u957f\u65b9\u5f62\u7684\u9762\u79ef\u5927\uff0e
\u5de6\u8fb9\u7684 \u3002 \u5148\u7b97\u6b63\u65b9\u5f62\uff0c 5*5=25 \u5728\u7b97 \u4e09\u89d2\u5f62 5*5/2=12.5 \u52a0\u8d77\u6765\u7b49\u4e8e37.5
\u53f3\u8fb9\u7684 \u5148\u7b97\u957f\u65b9\u5f62 \uff0c 10*20=200 \u4e09\u89d2\u5f62 5*8/2=20 \u52a0\u8d77\u6765\u7b49\u4e8e220
98×98=9604(平方厘米),
10956-9604=1352(平方厘米),
答:长方形的面积大.
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