(1)(160-120)÷120,
=40÷120,
≈33.3%;
答:五年级捐书的本书比四年级的多捐33.3%.
(2)六年级:
120×2+40,
=240+40,
=280(本);
二年级:
(280+20)÷5,
=300÷5,
=60(本);
答:六年级捐书280本,二年级捐书60本.
统计图如下:
(1)(160-120)÷120,
=40÷120,
≈33.3%;
答:五年级捐书的本书比四年级的多捐33.3%.
(2)六年级:
120×2+40,
=240+40,
=280(本);
二年级:
(280+20)÷5,
=300÷5,
=60(本);
答:六年级捐书280本,二年级捐书60本.
统计图如下: