青島版(五年制)三上數(shù)學(xué)7.1 兩位數(shù)乘整十?dāng)?shù)的口算 課件.pptx
兩位數(shù)乘整十?dāng)?shù)的口算,3610=(個(gè)),360,36個(gè)十是360,10個(gè)十是100,30個(gè)十是300,3610=(個(gè)),1,3 6,0,=,3 6,0,360,兩位數(shù)乘整十?dāng)?shù)的口算方法:先把整十?dāng)?shù) 0前面的數(shù)與兩位數(shù)相乘,計(jì)算出結(jié)果后,再在積的末尾添上 1個(gè) 0。,630,520,450,300,700,180,3020=(個(gè)),600,30 2=60,60 10=600,把20看作210,302